44 



236. Unio 



FAMILY NAYADES. 



ORDER MONOMYARIA. 



FAMILY MYTILACEA. 



237. Pinna squamosa ? 



238. Pecten 



239. Pecten 



FAMILY PECTINIDES. 



240. Chiton 



241. Chiton 



242. Chiton 



CLASS MOLLUSCA. 



ORDER GASTEROPODA 

 FAMILY PHYLLIDINA. 



FAMILY BULLiEANA. 



243. Bulla ampulla. 



ORDER TRACHELIPODA 

 FAMILY COLIMACEA. 



244. Helix pomatia. England. 



245. Helix aspersa. England. 3 specimens. 



246. Helix melanotragus. Africa. 



247. Helix nemoralis. England. 



248. Helix . England. 2 specimens. 



249. Helix . West Indies. 



250. Helix . West Indies. 



251. Helix . West Indies. 



252. Carocolla . West Indies. 



253. 254. Bulinus rosaceus. West Indies. 



255. Bulinus rosaceus, (young.) 



256, 257. Pupa . West Indies. 



258. Auricula West Indies. 



