PERISTOMATA. 
2. M. acicularis, Ferussac, Monog., Mem. Soc. p. 160; Sow. Gen. f.4. 
8. M. Braziliensis, Moricand ; Jay’s Cat. of Shells, p. 63. 
* 4. M. Buccinoides, Ferussac, Monog., Mem.Soe. p.148. pl. 7. f. 1-11. 
Buccinun prerosum, Linneus ; Melania Buccinoidea, Olivier. 
Melanopsis levigata, Lamarck. 
5. M. cariosa, Deshayes, Enc. Méth. v. 2. p. 435. no. 2. 
Murex cariosus, Linneeus ; Melanopsis castellata, Ferussac. 
6. M. cornea, Ferussac; Jay’s Cat. of Shells, p. 63. 
Xx 7. M. costata, Ferussac, Syst. Conch. p. 71. no. 2; Sowerby, Genera 
of Shells, f. 3. 
Melania costata, Olivier. 
8. M. Dufourii, Ferussac, Monog., Mem. Soc. p. 153. pl. 18. f. 5. 
9. M. erosa, Roth, Moll. Spes. p. 24. 
Melanopsis levigata, Lamarck. 
10. M. Esperi, Ferussac, Monog., Mem. Soe. Paris, p. 160. no. 10. 
11. M. Ferussacii, Roth, Moll. Spes. p. 24. pl. 2. f. 10. 
12. M. fusiformis, Sowerdy, Genera of Shells, f. 2. 
13. M. granulosa, (Pirena), Lamarck, Anim. sans vert. v. 8. p. 551. 
14. M. Jordanica, Roth, Moll. Spes. pl. 2. f. 12, 13. 
Melanopsis costata, var., Olivier. 
15. M. labiata, Sowerby, Tankerville Cat. App. p. 9. 
16. M. Neriteeformis, Deshayes, Enc. Méth. v. 2. p.438. no. 14. 
17. M. nodosa, Ferussac, Monog., Mem. Soc. Paris, p. 158. pl. 1. f. 18. 
18. M. semigranulosa, Deshayes; Say, Amer. Conch. pl. 8. f. 1-3. 
Melania nupera, Say. 
19, M. spinosa, Deshayes, Enc. méth. v. 2. p. 337. no. 12. 
Helix cuspidata, Dillwyn; Buccinum flumineum, Gmelin ; 
Pirena spinosa, Lamarck. 
20. M. Wagneri, Roth, Moll, Spes. p. 24. pl. 2. f. 11. 
Famity Wl. PERISTOMATA. 
Genus I. VALVATA, Miller. 
1. V. carinata, Sowerby, Genera of Shells, no. 41. 
Valvata tricarinata, Say. 
2. V. cristata, Miller ; Chemnitz, Conch. Supp. pl. 235. f. 4136, 
Valvata planorbis, Draparnaud. 
3. V. depressa, Pfeiffer, Syst. v. 1. p. 100. pl. 4. f. 33. 
4, V. minuta, Draparnaud, Moll, p. 42. pl. 1. f. 36-38. 
