2l8 BUU.KTIN 31 ^18 



PLATE 17 

 Figure Page 



1. Pinna cazacawensis , n. sp., natural size 31 



2. The same ; imprint of exterior, showing markings. Specimens 



from 5 mi. N. W. of Orangeburg, S. C. 



3. Modiolus cawcaiVensis,n. s^., ahout naXnraX size 31 



Imprint of exterior, showing markings. 



4. The same ; cast showing size and general form. Columbia 



road, 5 mi. N. of Orangeburg, S. C. 



5, a. Modiolus (Mauricia) honstonius Har., 5a , X 3 32 



From type specimen ; 3 mi. N. E. of Crockett, Houston 

 Co., Tex. Now in Tex. State Univ. Coll. 



6. Modiolus texamis Gabb 32 



Imprint of exterior from near Redland, La. Now in the Nat- 

 ional Museum. 



7. The same, showing * 'dentition" anteriorly. Enlarged about 



4 diam. 



8. Perhaps the same, from near Georgetown, Ga. 



9. Modiolaria alabamiensisMr., X 7. 33 



Copy of Meyer's figure. 



10. Lithophaga claibornensis Con., X3 34 



Aldrich's figure. 



11. The same from Conrad's original figure. 



12,13. Lithophaga petricoloides (Lea), 34 



From de Gregorio. 



14-16. Crenella latifrons Con. X 4 34 



Claiborne specimens from U. S. Nat. Mus. Coll. 



17-20. Crenella margaritacea Con., X 4 35 



21-24. Crenella isocardioides Lea, X 4 - 36 



