Plate 12. 



Page. 

 Fig. 1. Dentalium sericatum Dall. Type, 13 mm. (juvenile) 71 



2. Dentalium liodon 'Pilshrj and Sharp . T^-pe, 25.3 mm. Copy of original 



figure 76 



3. Dentalium liodon Pilsbry and Sharp. Enlarged apical portion. Copy 



of original 76 



4. DentaKum Ziorfon Pilsbry and Sharp. Enlarged anterior portion. Copy 



of original 76 



5. Dentalium callipeplum Dall. Type, 62 mm 74 



6. Dentalium sericatum Dall. Detail of apical portion 71 



7. Dentalium calamus Dall. Type, 19.5 mm 72 



8. Dentalium calamus Dall. Apex detail 72 



163 



