341 St, Maurice and Claiborne Pelecypoda 241 



PLATE 40 



Figure Page 



I, 2, a. Lticina rottinda 'L&Si 122 



Fig. I, 28 mm. 

 2, 29 " 

 2 a, 31 " Claiborne. 



3, 4, a. Cordis claibornensis Dall ., 123 



Fig. 3, 35 mm. 



4, 31 '■ 



4 a, 32 + mm. Claiborne. 



5. (fcri^u /ma'a/a Conrad, 35 mm., Claiborne 124 



6-8, a. Sphcsrella a?iteproducta HBxxis 124 



Fig, 6. 18 mm., type specimen, Singley Coll., Tex. 



7, 24 " St, Maurice. 



8, 27 " 



8 a, and b, enlarged, from St. Maur.ice specimens, 

 9. Sphcsrella bulla Con. A Jacksonian specimen from Bayou 

 Toro, La., showing difference in outline from antepro- 

 ducta from the St. Maurice beds. 



10-14. Diplodonta tmgtcHna Conrad, Claiborne 127 



Fig. 10, 13 mm. 



11, 27 " 



12, 17 " 



13, 4 " 



14, 5 " The latter two are greatly enlarged to 

 show juvenile characters. 



15, 16. Diplodonta nana Lea, Claiborne 128 



Fig. 15, 3-5 mm. 

 16, 5 " 



17-19. Diplodonta inflata 'L,ea.^ Claiborne 129 



Fig. 17, 10.5 mm. 



18, 12 



19, 16 "' 



20-21, a. Diplodonta corbiscula, n. sp., 4 mm., Claiborne 130 



