PLATE I. 



Fig. I. Dentalmm elephantiman L. Fiom Conch. Icon. 



Fig. 2. Dentalinm formosnm Ad. & R. From PiLSBRV. 



Fig. 3. Dcntaliuiii aprinum L. From Conch. Icon. 



Fig. 4. Dentaliuin interstriatum Sowb. From Concli. Icon. 



Fig. 5. Dcntaüuni Letsonae F. & Sh. From PiLSBRY. 



Fig. 6. Dcntaliuvi javaniini Sowb. From Conch. Icon. 



Fig. 7. Dentalium bisexangulatiim Sowb. From Conch. Icon. 



Fig. 8. Dentalinm octangnlatum Donovan. From Conch. Icon. 



Fig. 9. Dentaliuvi intercalatuiu Gould. From PiLSBRY. 



Fig. 10. Dentalinm psendoscxagonnm Desh. From Conch. Icon. 



Fig. II. Dentalium Lessoni Desh. From Deshayes. 



Fig. 12. Dentalinm Slioplandi Jouss. From PiLSBRY. 



Fig. 13. Dentalinm qnadrapicale Sowb. From Conch. Icon. 



Fig. 14. DentaliiDu Iiexagonum Gould. From Conch. Icon. 



Fig. 15. Dentalium porcatnm Gould. From Conch. Icon. 



Fig. 16. Dentalinm cancellatnm Sowb. From Conch. Icon. 



Fig. 17. Dentalinm variabile Desh. From Conch. Icon. 



Fig. 18. Dentalinm Belcheri Sowb. From Conch. Icon. 



Fig. 19. Dentalinm mnltistriatnm Desh. From DESHAYES. 



Fig. 20. Dentalinm politnm L. From Desh.\YES. 



Fig. 21. Dentalinm lactenm Desh. From Deshayes. 



