On some Points in the Morphology of the Test of the Temnopleuridae

P. Martin Duncan
1882 Journal of the Linnean Society of London Zoology  
Oh' THE TEST OF TILE TENNOPLEUBIDI. 343 any. Colou~ porcellaiieous. Spire very short, rouudcdly conical, subscalar from the cylindrical rise of the whorls out of the perpendicularly sunk sutural channel. Apex very blunt and rather large, impressed. Whorls 5, very short, except the last, which occupies nearly the whole shell, rounded above, cylindrical below in the channel of tlie suture, which is axially impressed. Mouth oblong, pointed and channelled above, slightly narrowed below. Outer 7+
more » ... below. Outer 7+ thin, scarcely protiiincnt or arched, running out to a blunt point in front to the right, whence it is obliquely truncated backwards to the point of the pillar with a deepish cut. I m e i . lip : there is on tlie body a wry lhick prominent and irregular pad of glaze, which curves round the straight point of the pillar and there is 4-plaited, m d , with a sharply defined edge, encircles the point of the shell. 11. 0.26. B. 0.13. Penultimate whorl, height 0.038. Mouth, height 0.19, breadth 0.0'7. The low spire, very blunt apex, and four plaits on the pillarpad distinguish this species from 0. rosalina, Duelos, or 0. r@fasciata, Reeve (which Dr. Kobelt holds as= 0. mutica, Say), or 0. inconspicua, C. R. Ad. It is perhaps most; like 0. yusilla, C. B. Ad., which it resembles in lowness of spire mid aiigularity at suture ; but the spire is even lower than in that species, mid the body-whorl is more tumid.
doi:10.1111/j.1096-3642.1882.tb02585.x fatcat:5nzrwz2vingqpcp3xgjpltjoma