U. S. NATIONAL MUSEUM 



3ULLETIN 68 PL. 19 



Sa 





Ta 



((''II '1 

 8a 



loa 



iv> 



1 . lacunata, p. 1 70 



2. exarata, p. 177 



3. poppei, p. 1 70 



Odostomia 



4. terebellum, p. 177 



5. aepynota, p. 1 78 



6. armata, p 1 77 



7. galapagensis, p. 1 79 



8. pedroana p. 1 72 



9. turricula, p. 179 

 10. hemphilli, p. 176 



