EXPLANATION OF PLATES. 



429' 



95. Anisomj^on patelliformis, Meek and Hayden. Cret. 



Nebraska, ....... 



96. Gadinia afra, Gra3\ Africa, 



97. Siphonaria sipho, Sowb. India, . 



98. Dentalium elepliantinum, Linn, Philippines, 



99. Cadulus subfusiformis, Sars. Norway, 

 100. Siphonodentalium vitreum, Sars. Norway, 



1. Dentalium (Entails) Delesserti, Chenu. East Indies 



110 

 110 

 110 

 111 

 115 

 115 

 114 



Plate 103. 



2. 



3. 



4. 



5. 



6. 



7. 



8. 



9. 

 10. 

 11. 

 12. 

 13. 

 14. 

 15. 

 16. 



n. 



18. 

 19. 

 20. 



21. 

 22. 

 23. 

 24. 



25. 

 26. 



27. 

 28. 

 29. 

 30. 

 31. 

 32. 



33. 

 34. 



Otina Otis, Turton. f . England, • . . .98 

 Otina (Morvillia) zonata, Gould. Massachusetts, II, 208 

 CamptonyxTheobaldi, Benson. India, . . .98 

 Limnfea (Bulimngea) megasoma, Say. U. S., . . 101 

 Limngea (Radix) auricularia, Linn. Europe, . . 101 

 Limnaea ( L^' mnophj^sa) reflexa, Say. U. S., . . 101 

 Limnsea (Acella) gracilis. Jay. U. S., . . .101 

 Limngea (Lymnus) stagnalis, Linn, U. S., Europe, . 101 

 Amphipeplea glutinosa,Miill. Ireland, . . . 102 

 Erinna Newcombii, Ad. Sandwich Islands, . .102 

 Physa ancillaria. Say. U. S., . . . . . 102 



Physa fontinalis, Linn. Europe, . . . .102 



Physa (Isidora) Integra, Hald. U. S., . . .102 



Physa (Physella) globosa, Hald. U. S., . . . 103 

 Physa (Physodon) microstoma, Hald. U. S., . . 103 

 Physa (Costatella) costata, Newcomb. California, . 103 

 Phj^sopsis (Ameria) lirata, Tristram. Madagascar, . 103 

 Aplexahypnorum, Linn. Europe, U. S., . . . 103 

 Aplexa (Macrophj^sa) columnaris, Desh. Eocene, 

 Paris Basin, . . . . . . . .103 



Physopsis Africana, Krauss. South Africa, . .103 

 Chilina puelcha, d'Orb. South America, . . . 104 

 Pompholj'x effusa, Lea. California, «. . . . 105 



Choanomphalus Maacki, Gerstf. Lake Baikal, . . 105 

 Carinifex Newberryi, Lea. California, . . . 105 

 Carinifex (Yorticifex) Binneyi, Meek. Tertiary; Ne- 

 vada, ......... 105 



Planorbis corneus,Linn. Europe, . . . . 106 



Planorbis (Taphius) andecolus, Orb. So. America, . 106 

 Planorbis (Helisoma) bicarinatus, Saj^ U. S., . . 106 

 Planorbis (Planorbula) campanulatus, Sa3^ U. S., . 106 

 Planorbis (Menetus) heloicus. Orb. So. America, . 106 

 Planorbis (Bathyomphalus) anatinus. Orb. f. South 

 America, , . . . . . . . . 106 



Planorbis (Auisus) Kermatoides, Orb. So. America, 107 

 Segmentina lacustris, Lightfoot. Europe, . . 107 



