in the Chair. Specimens were exhibited of three species of the genus Bulinus, Lam., which were regarded by Mr. G. B. Sowerby as previously undescribed. BULINUS LEUCOSTOMA. Bul. testd ovatd, ventricosd, antic; latiore, postic? obtusd ; anfractibus quatuor, primis longitudinaliter subsulcatis, ultimo rnaximo, h i , omnibus olivaceo-fuscis, suturdpallidiore, crenulatd ; aperturd oblong&, posticb acuminatd, yeritremate rejexo, albo : long. 2.6, lat. 1.4 poll. Hab. in provinci.2 Peruvia Xagua dictL.

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... D. Matthews.-Mus. Mr. Gray is of opinion that this is Bul. granulosus of M. Rang. BIJLINUS BADIUS. He characterizes them as follows : D. Miller. Bul. testd ovutb, ventricosd, posticb subacuminatd ; anfractibus quinque, rotundatis, longitudinaliter striatis. fulvescentibus fusco fasciatis, fasciis interruptis; umbilico minimo ; aperturd ovatd, postic2 subacuminatd; peritremate tenui, acuto : long. I., lat. 0.6 poll. Hab. in provinciL Peruviae Xagua dicti. D. Matthew5.-Muss. DD. Miller, Cuming, et Sowerby. BULINUS BICOLOR. But. test& oblongs', postic2 subacuminatd, pallescente, fasciis interruptis fuscis ; anfractibus quinque, subventricosis, ultimo majore ; umbilico minimo ; aperturd subovatd, pos-tic2 acuminatd; peritremate tenui, subacuto: long. 0.9, lat. 0.4 Hab. in provinei4 Peruvia Xagua dictil. D. Mattnews.-Muss. The specimens were brought to England by Mr. Miller, to whom poll. DD. Miller, Cuming, et Sowerby.