416 EXPLANATION OF PLATES. 
FIGURE. ; PAGE. 
98. Melanopsis (Canthidomus) costata, Fer. Palestine, . 255 
99. Melanopsis przrosa, Linn. Mediterranean Region, . 255 
100. Melanopsis (Melanoptycha) Bittneri, Neumayr. Ter- 
tiary, Austria, . : . 255 
1. Faunus atra, Linn. Moluccas, ; : : A . 255 
2. Melanatria fluminea, Gmelin. "Madagascar, ! . 255 
3, 4. Io spinosa, Lea. Tennessee, . : ! i . 256 
5. Angitrema Duttoniana, Lea. Tennessee, . 2 . 256 
6. Angitrema (Lithasia) dilatata, Lea. Tennessee, . . 256 
7. Angitrema (Strephobasis) curta, Hald. Tennessee, . 256 
8. Pleurocera canaliculata, Say. Ohio River, . g « 2a 
9. Goniobasis impressa, Lea. Georgia, . : ‘ . 257 
10. Goniobasis Boykiniana, Lea. Georgia, : d . 257 
11. Goniobasis Virginica, Say. Delaware River, . . 257 
12. Goniobasis (Euryeelon) Anthonyi, Budd. Tennessee, 257 
13. Pyrgulifera humerosa, Meek. Cret., Wyoming, . . 257 
14-16. Schizostoma babylonicum, Lea. Coosa River, Ala., 257 
17. Anculosa teniata,Conr. Alabama, . . 258 
19. Anculosa (Mudalia) dissimilis, Say. James River, 
Vino . 258 
20, 21. Rissoella diaphana, Forbes and Hanley. England, 258 
22. Hyala vitrea, Forbes and Hanley. England, . ~ 259 
23. Gabbia australis, Tryon. Australia, «. 2 . 260 
24, 25. Rissoina Catesbyana. Cuba, ‘ : 3 . 261 
26, Rissoina (Zebina) tridentata, Philippines, ‘ . 261 
27. Rissoina (Zebinella) elegantissima, d’Orb. Cuba, . 261 
28. Rissoa costulata, Risso. England, . ; . 263 
PLATE 72. 
29. Bithynia Leachii, Moquin-Tandon. France, . : . 260 
30. Tatea Huonensis, Woods. Tasmania, . : ; aay) 
31. Stenothyra deltz, Benson. India, ; ‘ : . 260 
32, 33. Skenea planorbis, Fabr. England, . , aol 
34. Rissoina (Schwartziella) coronata, Recluz. Mauritius, . 262 
35, 36. Rissoina (Hatoniella) Kerguelenensis, K. A. Smith. 
Kerguelen’s Isl., 3 . 262 
37. Rissoina (Phosinella) Sagraiana, Orb. Cuba, ; . 262 
38. Barleeia rubra, Ads. England, ; ‘ . 262 
39. Keilostoma eximia, Desh. Fossil, Paris basin, ; . 262 
40. Rissoa (Anabathron ) contabulata, Frauenf. Australia, 263 
41. Rissoa (Zippora) Moutonii, Dupuy. France, ] . 263 
42. Rissoa (Pterostoma) tuba, Desh. Kocene, France, . 263 
43. Rissoa (Setia) pulcherrima, Jeffreys. England, . . 264 
44, Rissoa (Ceratia) proxima, Alder. England, , . 264 
45. Rissoa (Cingula) cingillus, Mont. England, ; . 264 
46. Rissoa (Onoba) striata, Mont. England, . : . 264 
