EXPLANATION OF THE PLATES. 



PLATE LXXV. 



Fig. 



1 Base of TRUNCATELLA PULCHELLA Pfr. 



2 " " CARIB.EENSIS Sowb., from Chemn. pi. 2, 



fig. 22. 



3 TRUNCATELLA BILABIATA Pfr., from Chemn. pi. 1, fig. 28. 



4 " CARIB.EENSIS Sowb., from Chemn. pi. 1, fig. 36. 



5 " SUBCYLINDRICA Gray, from Chemn. pi. 2, fig. 2. 



6 " " " " " " ficr. 4. 



o 



7 Base of TRUNCATELLA BILABIATA Pfr., from Chemn. pi. 1, fig. 30. 



8 " " SUBCYLINDRICA Gray. 



9 TRUNCATELLA PULCHELLA Pfr., from Chemn. pi. 2, fig. 12. 



10 " " " pi. 2, fig. 13. 



11 Animal of TRUNCATELLA, from Adams Gen. pi. 78, fig. 1. 



12 AURICULA CINGULATA Pfr., from Orbignypl. 13, fig. 8. 



13 " " " " " pi. 13, fig. 9. 



14 HELICINA HANLEYANA Pfr., from Chemn. pi. 9, fig. 7. 



15 " AMBELIANA Sowb., Thes. Conch, pi. 1, fig. 19. 



16 " HANLEYANA Pfr., from Chemn. pi. 9, fig. 8. 



17 " SUBGLOBULOSA Poey twice the natural size. 



18 " MINUTA Sowb., from Thes. Conch, pi. 1, fig. 41. 



19 " VESTITA Gould, " pi. 1, fig. 42. 



20 " CASTANEA Gould, " pi. 1, fig. 32. 



21 Animal of MELAMPUS COFFEA Lin., from Ad. Gen. pi. 82, fig. 7. 



22 " ALEXIA DENTICULATA Mont., " " pi. 82, fig. 5. 



23 MELAMPUS BIDENTATUS Say. 



24 Animal of CHONDROPOMA DENTATUM Say twice the natural size. 



25 MELAMPUS COFFEA Lin., from Orbigny pi. 13, fig. 6. 

 27 Operculum of 24 enlarged. 



