418 EXPLANATION OF PLATES. 



PIGUEE. ' PAGE. 



86. Fluminicola Nuttalliana, Lea. Oregon, . . . 211 



81, 88. Cochliopa Rowellii, Tryon. California, . .211 



89. Lacunopsis Jullieni, Desli. Cambodia, . . . 212 



90. 91. Lacunopsis (Spekia) zonata, Woodw. L. Tan- 



ganyika, Africa, ........ 212 



92. Pomatiopsis lapidaria. Say. Pennsylvania, . .212 



93. Assiminea Grayana, Leach. Europe, . . . .212 

 18. Assiminea (Paludinella) littorea, Cliiaje. Europe, . 213 



94. Assiminea (Acmella) tersa, Benson. India, . . 213 



95. Assiminea (Hydrocena) Cattaroensis, Pf. Dalmatia, . 213 



96. Valvata piscinalis, Miiller. Europe, . . . . 213 



91. Valvata (Girorbis) cristata, Miiller. Europe, . . 213 

 98, 99. Yalvata (Tropidina) tricarinata, Say. U. States, . 213 



100. Valvata (Lyogyrus) pupoidea, Gould. Massachusetts, 214 



1. Toxosoma eborea, Conr. Tert., So. America, . . 210 



2. Liosoma curta, Conrad. Tert., So. America, . . 210 



3. Bithynella (Micropyrgus) minutulus. Meek. Laramie, 



Dakotah, 261 



4. Euchilus Deschiensianum, Sandberger, . . . 261 



5. Velainelia columnaris, Vasseur. Eocene, France, . 318 



Plate 14. 



6. Paludina Bengalensis, Lam. India, .... 214 

 1. Paludina (Melantho) Integra, Say. U. States, . . 214 



8. Paludina (Tulotoma) bimonilifera. Lea. Alabama, . 214 



9. Paludina (Margar3^a) Melanoides, Nevill. L. Tali, 



Yunnan, ......... 214 



10. Paludina (Neothauma) Tanganyicense, E. A. Smith. 



L. Tanganyika, Africa, ...... 215 



11. Paludina (Tanganyicia) rufofilosa, E. A. Smith. L. 



Tanganyika, ........ 215 



12. Paludina (Mekongia) Jullieni, Desh. Cambodia, . 215 



13. Cleopatra bulimoides, Olivier. Egypt, . . . 215 



14. Lioplax subcarinata. Say. Delaware River, . . 215 



15. Ampullaria ampullacea, Linn. Borneo, . . . 216 



16. Ampullaria (Pomus) canaliculata. Lam. Florida, . 216 

 11. Ampullaria (Pomella) neritoides, d 'Orb. Uruguay, . 216 



18. Asolene Platse, d'Orb. Buenos Ayres, . . . 216 



19. Lanistes Bolteniana, Chemn. Nile, .... 211 



20. Meladomus olivacea, Sowb. W. Africa, . . . 211 



21. Marisa cornu-arietis, Linn. Rio Parana, . . . 211 



23. Marisa Chiquitensis, d'Orb. Bolivia, . . . .211 



Plate 15. 



24. Truncatella truncatula, Drap. Europe, . . . 211 



25. Geomelania Jamaicensis, Pfr. Jamaica, . . .218 



