Plate 10. 



Page. 



Fig. 1. Dentalium fioridense, new species. Type, 62 mm 64 



2. Dentalium fioridense . 25.5 mm. (juvenile) 64 



3. Dentalium ehoreum QonmA. Typeof "Tnatara" Dall. 42.5 mm 66 



4. Dentalium eboreum Conrad. Type of "leptum" Bush. 31 mm 66 



5. Dentalium eboreum Conrad. Detail of apiral portion 66 



6. Dentalium fioridense . Sculptural detail (anterior) 64 



7. Dentalium fioridense. Sculptural detail (posterior) 64 



8. Dentalium eboreum Conrad. Detail, median 66 



9. Dentalium eboreum Conrad. Detail, anterior 66 



161 



