257 



St. Maurice and Claiborne Pelecypoda 



257 



PLATE 56 

 Figure Page 



r-4, 7. Cordiila suden^onaia Dsill, Woods BluS 185 



Fig. I, 7 mm. 



2, 7 " 



3, 8 " 

 4,8 " 



7, 7 " 2 and 4 are mates. 



5, 6, 8. The same, var. short, vv'ith radii ; Woods Bkiff. 

 Fig. 5, 7 mm. 

 6, 6.5 " 



8, 5-5 " 



9, 10. Corbula ala'oamiensis Lea, a variety close to what de Gregorio 

 has styled var. inid ; Claiborne sand. 

 Figs, 9 and 10 both 6 mm. in length. 

 II. C. alabamiens-is Lea, 11 mm. ; a specimen from Orangeburg 

 Dist., showing a slightly broader form than is usual for 

 this species. 



C. alab., var. citronella^ n. var., Orangeburg Dist 186 



Small posterior development, inflated ; weak umbonal ridge. 

 Fig. 12, 10 mm. 



13- 9-5 " 



C alabamensis, ^^x. gregorioi i Cossmann, Claiborne 186 



Fig. 14, 14 mm. 

 15, II " 



C. alabaniiensis 1^0:3., Claiborne sand ; typical 185 



Fig. 16, 9 mm. 



17, II 



18, II 



19, 12 



20, 16 



21, 16.5 



22, 19 



23, 14 



24, 19 

 25- 24 

 26, 19 



27-30. C. alabajniensis, var. tedade. Greg., Claiborne 185 



Fig. 27, 14 mm. 



28, 12 " 



29, 16 " 



3^-33- Corbula densata Conrad, Jackson Eocene, Miss 185 



Fig. 31, 17 mm, 



32, 18 " 



33. 17 " 



12, 13. 



14, 15- 



16-26. 



