326 



EXPLANATION 01" PLATES. 



To be added to this 

 family. 



pia. 



Macrospira, fig. 514. 



Stenopus, fig. 516, 516. 



Abida, fig. 518. 



Gronidomus, fig. 519. 



Tmncatella, fig. 520, 521 



Caprella, fig. 522, 523. 



Pupina, CaUia, fig. 524—528. )> 



Megalomastoma, fig. 529. 



Cyclotus, fig. 530. 



Pteroeyclos, fig. 531. 



Trocbatella, fig. 532. 



Stropbostoma, fig. 534 — 536. 



Stoastoma, fig. 582. 



Fam. Lymneana. 



308. Limnsea stagnalis. 



309. — auriciilaria. E-adix, Montf. 



310. — castanea. Physa, Drap. 



311. Planorbis corneus. 



312. Planaria nitens, (from Lea.) 



Fam. Melaniana. 



313. Melania subulata. Melas, Montf. 



314. Melania prserosa and monodontoides. Anculosa, Say. 



315. Malanopsis costata. Eatmus, Montf. 



316. Pirena terebraKs. 



317. Pasithsea striata, (from Lea.) 



Fam, Peristomata. 



318. AmpuUaria fasciata. Ampbibola ; a. aperture. 

 319 Gruinaica. Lanistes, Montf. 



320. — ■ Cornu-arietis. Ceradotes, Guild. 



321. Paludina Bengalensis, 



322. Valvata piscinalis. 

 Bithinia, fig. 537. 

 Ampbibola, fig. 538. 

 Pacbylatra, fig. 539. 

 Paludomus, fig. 583. 



^ To be added to tbis family. 



