H I 



December 9, 1834. 

 "William Yarrell, Esq., in the Chair. 



Specimens were exhibited of three species of the genus Bulinus, 

 Lam., which were regarded by Mr. G. B. Sowerby as previously un- 

 described. He characterizes them as follows : 



Bulinus leucostoma. Bul. testd ovatd, ventricosd, anlice latiore, 

 postice obtvsd ; anfractibus ąuatuor, primis longitud'maliter sub- 

 snlcatis, ultimo maxbno, IcEvi, omnlbus olivaceo-fuscis, suturdpal- 

 lidiore, crenulatd ; ajjerturd oblongd, postice acuminatd, peritr-e- 

 mate reflexo, albo : long. 2' 6, lat. 1'4 poli. 



Hab. in provincia Peruvise Xagua dieta. D. Mattheivs. — Mus. 

 D. Miller. 



Mr. Gray is of opinion that this is Bul. granulosus of M. Rang. 



Bulinus baditjs. Bul. testd ovatd, ventricosd, postici subacumi- 

 natd ; anfractibus quinque, rotundatis, longitudinaliter striatis, 

 fulvescentibus fusco fasciatis, fasciis interruptis ; umbilico mi- 

 nimo ; aperturd ovatd, postice subacuminatd ; peritremate tenui, 

 acufo : long. 1", lat. O' 6 poli. 

 Hab. in provinciš, Peruvise Xagua dieta. D. Mattheivs. — Muss. 

 DD. Miller, Cuming, et Sowerby. 



Bulinus bicolor. Bul. testd oblongd, postice subacuminatd, pal- 

 lescente, fasciis interruptis f uscis ; anfractibus quinque, subventri- 

 cosis, ultimo majore ; umbilico minimo ; aperturd subovatd, pos- 

 tice acuminatd į peritremate tenui, subacuto : long. O" 9, lat. 0'4 

 poli. 

 Hab. in provincia Peruviae Xagua dictS.. D. Matthews. — Muss. 

 DD. Miller, Cuming, et Sowerby. 



The specimens \vere brought to England by Mr. Miller, to whom 

 the Society is indebted for their exhibition. 



The reading was concluded of a Paper entitled " Notės on the 

 Natūrai History and Habits of the Ornithorhynchus paradoxus, 

 Blum.," by Mr. George Bennett, Corr. Memb. Z. S. ; in which the 

 author gives a detailed aecount of bis inąuiries and researches on 

 the subject in question, made in the Colony of New South Wales, 

 and in the interior of New Holland, at the end of 1832 and com- 

 mencement of 1833. He commences by a description of the exter- 

 nal character of the animal, as observed by him in the living and 

 recent statė ; from which it appears that the greater or less degree 

 of nakedness of the uuder surfaee of the tail is dependent on age, 

 and is probably a result of the mode in which that organ trails upon 



No. XXIV. Proceedings of the Zoological Society. 



