EXPLANATION OF PLATES. 429 
FIGURE, PAGE, 
95. Anisomyon patelliformis, Meek and Hayden. Cret.; 
Nebraska, . ‘ ‘ ‘ . 110 
96. Gadinia afra, Gray. Afriea, . : - : - LbO 
97. Siphonaria sipho, Sowb. India, ; 5 . ; . 110 
98. Dentalium elephantinum, Linn, Philippines, . . ELL 
99. Cadulus subfusiformis, Sars. Norway, F , ~ ALS 
100. Siphonodentalium vitreum, Sars. Norway, , eg lis) 
1. Dentalium (Entalis) Delesserti, Chenu. Hast Indies, 114 
PLATE 103. 
2. Otina otis, Turton. ?. England, . 298 
3. Otina (Morvillia) zonata, Gould. Massachusetts, IT. 208 
4, Camptonyx Theobaldi, Benson. India, : é . 29S, 
5. Limnea (Bulimnea) megasoma, Bays Ws Sauce “| LOL 
6. Limnea (Radix) auricularia, Linn. Europe, ‘ . £04 
7. Limnea (Lymnophysa) reflexa, Say. U. S., : - bOL 
8. Limnea (Acella) gracilis, Jay. U. &., ‘ a LO 
9. Limnea (Lymnus) stagnalis, Linn. Ue 8: , Hurope, « 201 
10. Amphipeplea glutinosa, Mull. Ireland, : . 102 
11. Krinna Newcombii, Ad. Sandwich Islands, ‘ . 102 
12. Physa ancillaria, Say. U.S., A é : ‘ . 102 
13. Physa fontinalis, Linn. Europe, é ‘ ‘ . 102 
14. Physa (Isidora) integra, Bald!) Uics:; : > . 102 
15. Physa (Physella) globosa, Hald. U. 8., : ‘ . 103 
16. Physa (Physodon) microstoma, Hald. U. Salis . 103 
17. Physa (Costatella) costata, Newcomb. California, . 103 
18. Physopsis (Ameria) lirata, Tristram. Madagascar, . 103 
19. Aplexahypnorum, Linn. Europe, U.S., . ‘ . 103 
20. Aplexa (Macrophysa) ee Desh. Eocene, 
Paris Basin, : ‘ : ‘ é . 103 
21. Physopsis Africana, Krauss. South Africa, : . 103 
22. Chilina puelcha, d’Orb. South America, . ; . 104 
23. Pompholyx effusa, Lea. California, . . . 105 
24. Choanomphalus Maacki, Gerstf. Lake Baikal, ; . &O5 
25. Carinifex Newberryi, Ties: California, : 105 
26. Carinifex (Vorticifex) Binneyi, Meek. Tertiary Ne- 
vada, : 3 . 105 
27. Planorbis corneus, Linn. Europe, , . : . 106 
28. Planorbis (Taphius) andecolus, Orb. So. America, . 106 
29. Planorbis (Helisoma) bicarinatus, aye) ULSe ue - 106 
30. Planorbis (Planorbula) campanulatus, Say. U.S., . 106 
31. Planorbis (Menetus) heloicus, Orb. So. America, . LOG 
32. Planorbis (Bathyomphalus) anatinus, Orb. ¢. South 
America, . . 106 
33. Planorbis (Anisus) Kermatoides, ‘Orb. So. America, 107 
34. Segmentina lacustris, Lightfoot. Europe, ; « LOT 
