18 NEW-YORK STATE COLLECTION. 



FAMILY NAJADES. 



236 Unio 



ORDER MONOMYARLA. 



family mytilacea. 



237 Pinna squamosa? 



family pectinijdes. 



238 Pecten . 239 Pecten 



CLASS MOLLUSCA- 

 ORDER GASTEROPODA. 



FAMILY PHYLLIDINA. 



240 Chiton — — (5 specimens). 241 Chiton . 



242 Chiton . 



243 Bulla ampulla. 



FAMILY BTJLL^ANA. 



ORDER TRACHELIPODA. 



FAMILY COLIMACEA. 



244 Helix pomatia. England; 251 Helix . "West Indies. 



245 Helix aspersa(3). England. 252 Cakocolla . West Indies. 



246 Helix melanotragus. Africa. 253, 254 Bulinus rosaceus. W. I. 



247 Helix nEmoralis. England. 255 Bulinus kosaceus (young). 



248 Helix (2). England. 256, 257 Pupa . West Indies. 



249 Helix . West Indies. 25S Auricula . West Indies. 



250 Helix . "West Indies. 



family limneana. 

 259 Limn^ea stagnalis. 260 Planoreis corneus. 



family peristomata* 

 261 Abipullaria fasciata(3). 262 Ampullaria guinaica. W. I. 



263 Paludina (2). 



family neritacea. 



264 Neritina spinosa. 269 Natica (2). 



265 Neritina . 270 Nerita peloronta(2). 



266 Natica mamilla(2). 271 Nekita versicolor. 



267 Natica . 272 Nerita . 



268 Natica . 



