September 25th; Description of a New Species of Astroscopus, Brev., in the Museum of the Academy of Natural Sciences of Philadelphia; Description of a New Species of Chatoessus, Cuv., from New Jersey; Descriptions of New Cretaceous Corals from New Jersey; On Milne-Edwards' Synonymy of Xiphigorgia setacea; Descriptions of Reptiles from Tropical America and Asia; Catalogue of Birds from the Island of St. Thomas, West Indies, Collected and Presented to the Academy of Natural Sciences by Mr. Robert Swift. With ...

Charles C. Abbott, Wm. M. Gabb, Geo. H. Horn, E. D. Cope, John Cassin, F. B. Meek, A. H. Worthen, J. Aitken Meigs
1860 Proceedings of the Academy of Natural Sciences of Philadelphia  
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In fact, to a practised topographical eye, the aspect of the whole White Mountain range is that of synclinal erosion. Other considerations reinforce this opinion. The continuation and broadening of the range north-eastward through Maine and Lower Canada, where supersilurian rocks abound,-the termination of the range south-eastward before reaching Massachusetts and Vermont, as the Alleghany synclinal stops at Cattskill before crossing the Hudson, -the presence of horizontal rocks at Worcester and more generally than would be supposed through middle New Englandtke fact that the Connecticut Valley runs everywhere under the western escarprment of the White Mountains, separating it from the siluLrian range of the Green Mountains,-and the presence of Potsdam and other low formations in eastern Massachusetts,-all these facts would find their explanation in a synclinal terminal eroded structure of the White Mountain mass. The granite of Mount Osceola and the surrounding heights consists of large crystals of feldspar, smaller crystals of quartz and smaller flakes of mica. Here and there hornblende appears. The rock bears no resemblance to the subsilurian Highland and Blue Ridge range, and Adirondacks. It is friable under the weather, shedding its crystals upon the ground under every overhanging ledge. The boulders are rounded by the weather action apparently more than by movement; for they have only travelled down the slopes beneath the cliffs from which they have fallen, and where those that remain are sharp-angled. The peculiar gravel and sand of the Mad River Valley is a local drift of similar origin. The metamorphism of these granites is considered by Logan, Hunt, and others, as no longer disputable. They could easily originate in the clayey sandstones of Formations VIII., IX. and X., of the Appalachians. Considering the whole White Mountain mass a synclinal plateau,then the summit of Mount Washington, which is such an acknowledged anomaly, becomes regularly the single residual fragment of the highest formation which escaped erosion. Its rock is so different in texture and structure from the rest of the mountains that no other explanation seems possible; and if this hypothesis be adopted, there is no longer any need of that which supposes the submergence of New England up to the base of the head of Mt. Washington and no higher, leaving the head in the air to escape the general rounding and polishing action. It becomes easy to consider the external difference due rather to the difference of the rock formations above and below that horizon. It is to be hoped that a systematic explanation will be made of this interesting region and the structure made out and mapped, so that we may arrive at conclusions, instead of venturing conjectures. September 25th. Vice President BRIDGES in the Chair. Thirty six members present. The Committee on the paper of Mr. John Cassin, " Descriptions of New Birds from Western Africa in the Museum of the Academy of Natural Sciences," reported in favor of its publication in the journal of the Academy. On report of the respective Committees, the following papers were ordered to be published in the Proceedings: [Sept. NATURAL SCIENCES OF PHILADELPHIA. Astroscopus g u t t a t u s Abbott. Plate VII. Spec. Char.-Body depressed anteriorly. Head flattened ab)ve. Two subquadrangular depressions posterior to the orbits. Eyes prominent, situated in circular depressions, and five and a half diameters distant. The base of the two dorsals equals in length the distance from the anterior insertion of the first dorsal to the extremity of the upper jaw. Opercular apparatus large, the branchial aperture unusually wide; the opercle marked with distinct radiating striae, and margined below with a smooth, thick and semi-transparent membrane, which extends beyond the insertion of the pectoral fin. The insertion of the ventral fins is opposite the margin of the preopercle and greatly anterior to the insertion of the pectorals. The insertion of the anal fin is slightly posterior to the anterior insertion of the second dorsal, and extends nearer the base of the caudal than that fin. 2 D, 4-14. V, 5. P, 16. A, 13. C, 12 -2 Color.-In the alcoholic specimen. Back, upper portion of the cheeks, npper part of cranium, and upper jaw, bright chocolate; lighter on the head than body, and the depressions on the upper surface of the head very pale. Belly and throat pure white. The chocolate tinted surfaces are minutely covered with numerous circular spots or gutt2a, of the same tint, but several shades lighter. The membrane of the first dorsal black; and the second dorsal has three irregular bands of dull black, obliquely across it. The caudal with three parallel bands of blackish-brown, the middle of which appears to be the continuation of a variable longitudinal band on the centre of each side. The anal has a variable band of dull brown, darker upon the posterior termination. Locality.-Cape May, New Jersey. Beesley's Point? Description of a new species of Chatoessus, Cav., from New Jersey. BY CHARLES C. ABBOTT. Chatoessus i n s o c i a bi i s Abbott. Spec. Char.-Body compressed, sub-elliptical; dorsal outline greatly arched anteriorly to the dorsal fin, slightly and obliquely curved posteriorly. Ventral outline regularly curved from posterior insertion of the anal fin to the throat. Abdomen compressed, carinate and serrated. The head is very small; the breadth anterior to the angle of the opercle six-sevenths of the length from occiput to the extremity of the snout. Snout globose; upper lip fleshy, longer than the lower, which is membraneous. The angle of the jaws in a line with the centre of the orbits. Margin of operole membraneous, coarsely serrated; margin of preopercle, membraneous and circular. Dorsal fin quadrangular, the posterior ray prolonged; pectoral fin rounded, reaching beyond the base of the ventral fin; ventral fin equal in width to its length and reaching a slight distance beyond the posterior insertion of the dorsal fin; caudal fin forked. The numnber of the fin rays are, D} 14. P, 16. V, 8. A, 32. C, 28, sometimes 29. Color.-Back and upper third of the sides deep green, with a bluish cast in particular lights; lower two-thirds of the sides and the belly pure white. The deep green above and white beneath, meet abruptly, and do not blend to-1860.] PROCEEDINGS OF THE ACADEMY OF gether, except on the peduncle of the tail. The fins partake of the color of the region to which they belong, and exhibit irregularly shaped spots on each. These markings on the fins are very variable, and in some specimens are wanting. A very deep glossy black circular spot, above the angle of the opercle, marks the beginning of the lateral line, which is only apparent on a very careful examination. Total length, 15 inches; greatest width, 5j inches. This species is possessed of a gizzard similar to that of C. e lIi p t i c u s Kirtland; to which species this bears considerable resemblance, yet is very distinct in its general form, color and habits. The specimens of this fish, from which the deseription was taken, I procured in a secluded and very deep sheet of water, known as the " Sturgeon Pond," situated two miles below Trenton, N. J. The following items of its habits were collected from reliable fishermen and by my own observation. This fish is remarkably gregarious, and is never seen associating with any other than its owln species; it is a lover of deep and still water, seldom rising to the surface, and appears very averse to the bright light of the sun. If driven into a stream of water with considerable current, they immediately show signs of uneasiness, and, if not soon liberated, die. Two localities only I am acquainted with that abound with this species, and both are deep small lakes formed by the junction of several small streams, and never in these streamis has the fish been discovered, except when driven into them by the fishermen. As an article of food they are entirely worthless; yet they afford nmuch sport to juvenile anglers, by the rapidity with which they may be taken, with a trotut-fly, or common angling worm. Descriptions of new Cretaceous Corals from New Jersey. .BY WAM. M1. GABB AND GEO. H. IIORN. Hippotlhoa i r r e g u 1 a r i s .-Colony spreading, on shells, forming straight, cr but slightly curved lines; branching nearly at right angles, tlhough generally from but one side of the cell. Cells oval, flattened, placed closely together, united by a stout pedicle. Opening nearly central, with its greatest diameter in the directionl of the length of the cell, often with an ovarian vesicle at the distal extremity. The shape of the cell of this species relates it nearly to the H. s i m p 1 e x b' 0 1,. Cellepora b i 1 a b i a t a .-Colony encrusting, generally in elongate patches. Cells in lines arranged in an irregular quincunx, convex. Opening, viewed from above, nearly circular. The cell walls above and below the mouth project, forming two labiate processes. Cellepora c a r i n a t a .-Colony encrusting. Cells in quincunx. Walls of cells meeting anteriorly, forming a carina, whose apex projects forward, and toward the oral opening, apex often perforated. Carina diminishing as it approaches the cell below. Cellepora t y p i c a .-Cololny encrusting, in large patches. Cells arranged in radiating lilnes, usually in quincunx, irregular exteriorly, small, rhomboidal, spaces between oral openings wide, perforated by numerous large accessory foramina. This specimeni was found encrusting a Terebratula H a r 1 a n i, to which was also attached an Ostrea p a n d a, both being typical specimens. Reticulipora s a g e n a .-Colony large (about one inch in diameter), formed of plates, lateral plates not numerous, given off rectangularly; summit of plates perforated by cells, and thicker than the rest of the plate; lateral openings triangular, without any marked arrangement. Resembles the R. o b I i q u a. [Sept. NATURAL SCIENCES OF PHILADELP?HIA. 367' Reptomulticava c e p u 1 a r i s . Alveolites cepularis (?) S. G. Morton, Cretaceous. Colony irregular, nodulated, with a tendency to an irregular pyramidal outline. Cells elongated, hexagonal, large. This is probably the species named by Morton, but as -no description or figure was given, it cannot be certainly stated. Multicrescis p a r v i c e l1 a .-Colony large, anastomosing in the manner of Rhipidigorgia f 1 a b e 11 u m. Cells small, resembling those of M. L a n a t a D' Orb. Cellules wanting. NOTE.-Figures of the above species will be given in the next number of the Journal of the Academy. On Xilne-Edwards' Synonymy of Xiphigorgia setacea. BY GEO. H. HORN. My attention was directed to the above, by finding the polypidom, called by Dana " Gorgonia (Pterogorgia) s e t a c e a, " classed with the "X. s e t a c e a" of M.-Edwards, who considers them synonymous. The " X. s e t a c e a " of Edwards is thus described:-" Polypieroide en forme de rubans tre's-etroits, flexueux et tres-longs, mais sanls vestige de ramifications. Coenenchyme jaune; verrues calicif6res arrondies, de couleur rose, et formanit, de chaque cft6, une bordure saillante. Hab.-Mers d'Amerique." Pallas' original description is-" Gorgonia, simplex, rigida, cortice calcareo albo subverrucosa. Locus.-Mare America-num." Dana subsequently amplified the above description, rendering it more exolicit. " Gorgonia (Pterogorgia) s e t a c e a. Whitish, simple, rigid, rarely with a single branch; surface subverruculose; verruculm minute (one-third of a line), and obsolete, numerous and crowded, mostly on two opposite sides, with a narrow, naked interval between. Laguayra.-Z. Collins." The latter description was derived from a specimen in the Academy's Museum, and does not resemble either the description or figuire of Milne-Edwards. The "X. set a c e a, as described and figured by Milne-Edwards, agrees in every important respect with the "Gorgonia j u n c e a" of Pallas and subseijuent authors. " G. simplicissima, attenuata, subflexuoso, cortice crasso, rubro verrucoso." Pallas, 1766. " G. simplicissima, teres, utrinque, attenuata, osse corneo fusco, carne ochracea bisulcata, osculis crebris linearibus notata. " Ellis, 1786. ".G simplicissima, longissima, teres; carne ochracea subminiata; osculis, crebris sparsis subgranulatis." Lamarck, 1816. From the above descriptions, we conclude, that the species described by Milne-Edwards as " s e t a c e a, " is none other than the u n c e a" of older authors. Pterogorgia s i m p 1 e x described by Valenciennes, in Comnptes Rendus, xli. (pp. 10, et 13), differs from either the '; s e t a c e a " or "ju n c e a" in the form of its " verrues caliciferes." Scales smooth, toes 5-5. Palatine teeth none. Lower eyelid covered with large scales. Nostril in the centre of an elongate nasal plate. Two pairs of supranasals, contiguous. Internasal present, fronto-nasals absent. Frontal in contact witlh the interparietal, thus separating the fronto-parietals. Parietals small, widely separated by the broad occipital. Tail cylindrical. This genus of scinks is most nearly allied to Eumeces and Otosaurus, but mav be distinguished by the presence of two pairs of supranasals, and absence of fronto-nasal. S. ENNEAGRAMMUS Cope. Vertical plate elongate, broadest posteriorly, the lateral borders very concave. Palpebral plates five. Tail longer than the head and body. Color above glossy black, shading into ultramarine blue about the middle of the tail. A delicate line of the latter color occupies the centre of each of the central nine rows of dorsal scales. These are all discontinued upon the occiput. except the external one upon each side, which passes round the side of the hlead and meets its fellow upon the muzzle. The palpebral and supranasal plates are suffused with blue, and delicatelv bordered with black. Beneath dlirty white, shaded with blue upon the abdomen and tail. Length of head and body to vent, 15 lines ; of tail (mutilated) 16 lines. This beautiful little scink was discovered by Sr. Rafael M. De Oca, in the vicinity of Jalapa, Mexico, and obtained for the Academy by Dr. Thomas B. WVilson. TROPIDONOTUS COMPSOLEMUS Cope. Scales in nineteen longitudinal rows, all keeled. Head distinct, short, deep: profile anteriorly descending. Rostral plate twice as broad as high. Prefrontals subtriangular; loreal longer than high. One rather narrow preocular; postoculars three, the lowest very small. Vertical and superciliaries elongate; lateral borders of the former scarcelv converging; the latter narrow. Superior labials eight, fourth and fifth entering the orbit. inferior labials nine. Tail slender, slightly compressed at the base, three-tenths of the total length. Gastrosteges 126; a divided anal; uroste(es 67. Total length 16 inches; of tail 3 in. 6 lin. [Sept. NATURAL SCIENCES OF PHILADELPHIA. 369 Coloration. Above blackish brown, darkest anteriorly. Very indistinct, pale transverse bands are apparent. They are irregularly oblique, and separated bv intervals of two or three scales wide. Superior and inferior labials more or less completely margined anteriorly with yellow; geneial and gular plates spotted irregularly with the same. General color beneatb a peculiar stone brown. A darker shade occupies the centres of the gastrosteges as far as the vent. This is almost excluded anteriorly by a central series of transversely elliptical yellow spots, one near the anterior border of each gastrostege. These become narrower, and broken, and upon the posterior two-thirds of the belly are almost lost. There is a very indistinct row of smaller spots upon each side of it anteriorly. Habitat.? Key West. Mus. Comparative Zoology, Cambridge. This species should be compared with T. s i p e d o n, T. c e 1 a e n o and T. v a I i d u s. It differs from the first in the nuimber of rows of scales, and from all three in the form of the muzzle and coloration of the lower suirface. THAMNOPHIS SCALARIS Cope. Head narrow, elevated, the profile sloping in front, muzzle obtuse. General form moderately slender, the tail a little less than one fourth the total length. Superciliary and vertical plates elongate, the lateral borders of the latter straight and convergent. Occipitals elongate. Loreal plate higher than long; one pre-, three postoculars. Superior labials eight, fourth and fifth entering the orbit. Inferior labials ten. Anterior geneials longer than posterior. Scales in nineteen rows, not emarginate, the external smooth. Gastrosteges 143; an entire anal; urosteges 59 pair. Coloration. Beneath, and upon the first row of scales, dark, ashy olivaceous the latter frequently black at their bases. Second and half the third row of scales a little paler. The vertebral, and the borders of one row on each side of it, yellowish. The color of the remainder of the upper surface is brown, anteriorly shaded with olivaceous. This is crossed from the lateral to the dorsal stripe, on each side, by vertical bars, black, or deep brown bordered with black, numbering from the head to the origin of the tail, about sixty. There is a pair of large spots just behind the occipital plates, and one involving the temporals and the whole of the occipitals, its anterior border trilobate and produced upon the vertical and superciliaries. 'A short vellowish vitta extending from the posterior angle of the former plate along the occipital suture, represents a confluent pair of occipital spots. Habitat. Jalapa, Mexico, found by Sr. R. M. De Oca. Mus. Acadeuy. Presented by Thos. B. Wilson, M. D. ARIZONA JANI Cope. Head not very distinct, tapering. Rostral plate rounded, presenting an obtuse angle between the prefrontals. Post-frontals bent upon the sides of the head. Vertical longer than broad, the lateral borders much converging, posterior angle obtuse. Occipitals longer than vertical, subdivided as in Pityophis sp. Nostril between the nasals; loreal plate longer than high. One preocular not reaching the vertical, three postoculars. Superior labials eight, fourth and fifth entering the orbit, inferior labials twelve, sixth largest. Postgeneials shorter than pre-genials. Scales of the body in twenty-seven or nine rows, the central thirteen keeled. Tail short. Coloration. Above, a pale yellowish brown, browner on the crown and muzzle. A series of quadrate dorsal spots extends throughout the whole length, involving from thirteen to seventeen medial rows. Anteriorly they are separated by spaces eight scales wide, but these intervals diminish posteriorly. There is a lateral series of spots which alternate with those of the dorsal row and are sometimes confluent with others, which form a series along the tips of the gastrosteges posteriorly. Anteriorly the dorsal intervals are divided by a transverse series of three small spots, which are probably sometimes confluent. These markings are all black anteriorlv; posteriorly, they are shaded with 1860.] 370 PROCEEDINGS OF THE ACADEMY OF brown. Belly dirty yellowish. The length and number of gastrosteges of our specimen cannot be given, owing to its mutilated condition. Urosteges 58, the tail terminating in a rather long corneous appendage. Habitat. Buena Vista, Mexico. Lieut. Couch. Mus. Smnithsonian. This genus is intermnediate in structure between Rhinechis " Coluber " Gthr. and Pityophis. It has not the four postfrontals of the last, nor the divided anal shield of the first two. In form, the rostral plate is intermediate between those of " Coluber " and Pityophis. The present species is nearly allied to the A. p 1 e u r o s t i c t a Cope, (Elaphis pleurostictus Dum. & Bibr.) of Uraguay. Named in honor of Prof. Jan, of Milan, a distinguished herpetologist. DROMICUS TEMPORALIS Cope. Scales in seventeen longitudinal rows. Head distinct, eyes small, anterior; muzzle short. Mouth very inferior. Rostral plate prominent, but barely visible from above: prefrontals small: vertical broad, presenting an obtuse angle anteriorly, one less than a right angle posteriorly, the superciliary borders nearly parallel. Occipitals well developed, each bounded by three large, and two small temporals. Postnasal vertical, crescentic; loreal confluent with the preocular, (probably not a constant character); postoculars two on one side, one on the other. Superior labials seven, third and fourth entering the orbit. Inferior labials eight, fifth largest, seventh twice the size of the sixth. geneial pairs equal. Gastrosteges 167, a divided anal; (tail mutilated). Length of head and body seventeen inches. Coloration. Above, chocolate brown. A narrow yellow band with a broad blackish superior border extends from the throat to the vent, along the suture of the first and second rows of scales. The greater part of the first row, and the ends of the gastrosteges are involved in a blackish plumbeous band which extends from the throat to the vent: the central third of each scale of the fifth row on each side is brownish-vellow, the upper and lower thirds blackish; thus is formed a narrow black-edged band, which extends from the throat to the end of the tail A yellow band extends from the superior border of the first upper labial, crosses the lower halves of the posterior labials, and widening, extends upwards upon the temples and neck, forming apparently the rudiments of a collar. Throat and belly saffron yellow. Habitat. Probably Cuba. Muis. Comparative Zoology, Cambridge, Mass. AMASTRIDIUM Cope. Body cylindrical, elongate; tail moderate, slender. Head distinct, broad, short, tapering rather abruptly. Superior maxillary teeth in a cortinuous series, the last abruptly the longest, not grooved. Pupil round. Top of head flat, separated on the muzzle from the sides, by an angle. Superciliaries prominent. One anterior, two postoculars. Loreal none. Nasals large, one or two, the nostril situated in the centre of the anterior. Scales on the posterior parts of the body, slightly keeled. Anal and subcaudal scutella divided. This genus differs from Coronella Laur. in the short, depressed, angular head, and the absence of the loreal plate. The form of the head somewhat resembles Xenodon, but the form of the body, the plating and dentition, are different. A. VELIFERUM Cope. Scales in seventeen longitudinal rows, smooth on the anterior half of the body: posteriorly a few dorsal rows with faint keels, becoming stronger toward the tail, an(d extending on all the scales near the anal region. Here they are tuberculous, as in Aspidura t r a c h y p r o c t a nobis. Tail nearly one-third the total length. Occipital plates large, almost reaching the labials in front, posteriorly accuminate; vertical long, acute behind; superciliaries large, promi-[Sept. NATURAL SCIENCES OF PhEILADELPHIA. 371 uent, broad behind. Postfrontals small, their aniterior outline regularly curved; prefroutals small, quadrangular. Rostral nearly rectangular, not appearing on the surface of the head. Postnasal high, its apex visible from above, opposite the suture between the pre-and postfrontals. Superior labials seven, eye resting on third and fourth. Inferior labials nine. Geneials two pair, the anterior shorter. Total length 14 in. 11 lin. tail 4 in. 10 1. Gastrosteges 127, urosteges 85. Coloration. Above and below, reddish-brown, paler in the centres of the gastrosteges. Every fourth scale of the fifth row on each side, pale, the adjacent scales on the fourth and sixth rows, generally darker. Top of the head much lighter, varied anteriorly; palest behind the eye and above the labials. The latter are dark with a few light spots. Habitat. Cocuyas de Veraguas, N. Grenada. Mr. R. W. Mitchell. Mus. Academy Natural Sciences. The colors of this species are quite similar to those of Tantilla r e t i c u I a t a nob. from the same locality. Its physiognomie is very unprepossessing. SCOLECOPHaS FUMICEPS Cope. Head not distinct from the body. Scales in fifteen rows. Frontal plates broad and short; vertical broad, presenting an obtuse angle anteriorly, an acute one posteriorly, its occipital suture longer than its superciliary. Occipitals large, as long as postfrontals and vertical together. Prenasal large; postnasal prolonged to the single preocular, excluding the loreal. Postoculars two. Superior labials seven, third and fourth entering the orbit, seventh largest. Temporals, two large and two small. Inferior labials six, fourth the largest. Breadth of anterior geneials equal to half their length, which is greater than that of the posterior pair. Gastrosteges 132 ; a divided anal; urosteges 42. Total length 5 inches ; tail I in. 10 lin. Coloration. Above, uniform pale brown, shading into dirty white beneath. The top of the head, including the oculars and temporals, and for four scales back of the occipitals, blackish-brown. Rostral, prefrontals and upper labials, pale brownish. Habitat. Probably Cuba. Mus. Comparative Zoology, Cambridge, Mass. Fam. ADENOMIDAE. Opisthoylossa platydactyla without maxillary teeth, with perfectly developed ear, parotid glands, dilated apophyses of sacral vertebra, and palmate feet. ADnENOMUS Cope. Hylaeform. Head broad, short. Parotids above the shoulder, long and narrow; skin rough. Vomerine teeth none. Tongue elongate, oval, almost cylindrical anteriorly, posteriorly entire, and free for about two-fifths its length. Tympanum indistinct. Fingers very slightly webbed, the palettes of moderate size. A subgular vocal sac. A. BADIOFLAYUS Cope. Muzzle short, elevated; canthus rostralis concave. Nostril oval, lateral. Eyes very large, transverse diameter of the eyelids greater than that of the ossa frontalia. Tvmpanum inconspicuous, surmounted by small tubercles. Skin of the whole upper surface fuberculous, and especially that of the scapular protuberance, and a short lateral fold. No gular or pectoral fold ; tarsus half the length of the tibia, which is but little longer than the fourth phalanx. Two tubercles on the metatarsus, one on the metacarpus. First finger half the length of the fourth. Coloration. Above, ground color, fulvous. The sides as far as the eye, a spot above the anterior canthus of the latter, one upon each eyelid, a band beginning upon the occiput and bifurcating between the parotids, and a large chevron-shaped band upon the sacral and iliac regions, ferruginous or bav. A 1860.] PROCEEDINGS OF THE ACADEMY OF broad band of the same bordered with yellow, crosses the closed femoratibite and tarsi. A similar one crosses the fore-arm. Upper lip varied with yellow; a band of the same, extending from the angle of the mouth to the shoulder. Under surface of the belly and extremities, saffron yellow, with some irregular medial spots of an orange bay color. Length from muzzle to end of coccyx 1 inch, 2lines. Femur from coccyx 6i lines, tibia nearly 7 lines. Habitat. Ceylon. Mus. Acad. Nat. Sciences. From Mlr. H. Cuming, in ex. PHYLLOBATES TRUNCATUS Cope. Skin above and below smooth, except some faint granulations upon the posterior part of the abdomen. Tongue small, linear, entire. Thumb nearly as long as the middle digit. Front and canthus rostralis convex. Muzzle concave truncate, elevated; nostrils lateral. Tympanum very near the eye, less than half its size. Coloration. Upper and lower surfaces of head, body and extremities a dark ferruginous maroon. A pale, curved line upon each side; beneath this another one, which unite3 with its fellow upon the anterior part of the abdomen. From this point of junction a medial band takes its rise, and bifurcates posteriorlv. A pair of parallel lines upon the throat, which unite anteriorly, following the curve of the mandible. Extremities sparsely and irregularly spotted with the same faint shade. Habitat.? New Grenada. M1us. Academy. From the Philadelphia Museum, in exchange. The species of this genus hitherto described, are P. b i c o 1 o r Bibron, firom Cuba, P. m el a n orrhin us Berthold, from New Granada, and P. a u ratu s Girard, from Chili. SPELERPES BELLII Gray. It is the first name published with an appropriate specific diagnosis, and therefore is adopted here. Dr. Gray was, however, not aware that to the present species belongs the synonymy and notice of the structure of the toes, quoted from Baird, under the genus Oedipus of the " Catalogue." That this is the case, I have upon the excellent authority of Prof. Baird himself, who states that the appearance of "sucker-like discs upon the extremities of the toes. similar to those of Hyla," resulted from the contraction of the integuments about the proximal phalanges, in an old specimen, thus giving prominence to the small tubercle upon the inferior surface of the extremity of each toe. The Oedipus of Gray appeirs to be the Oedipus of Tschudi, but I have seen neither specimens nor descriptions which correspond with that of his 0. v a r i e g a t u s. [Sept.