9S3 St. Maurice and Claiborne Pelecypoda 253 



PLATE 52 



Figure Page 



1-3. Semele linosa Conrad, 25 mm. ; base of Claiborne Bluff 170 



Fig. 2, shows hinge enlarged. 



3, a reduced interior cast showing pallial line, sinus 

 &c. 



4, a. \'ax. claihornensis, -a. \^x.,^ \\\m.., Claiborne sand 171 



U. S. Nat. Mus. specimen. 



5, a. Var. of litiosa, Keitt's Ravine, S. C. ; 15 mm. 



U. S. Nat. Mus. specimen. 



6. Var. c/aibonteusis, showing affinities with australina. 

 Length, 10.5 mm. 



7, 8. .S>w^/^/)ro/>i«fl'^? Conrad, 16 mm., Claiborne sand 171 



9, a, b. Semele australina, n. sp., 17 mm., Orangeburg Dist., S. C... 172 



10. Seuielc, 40 mm. ; Rio Grande, Tex. Var. australina f 172 



II, a. Abra ititens Lea, 5.3 mm. ; Claiborne sand 173 



12. Abra ni tens Li^a., 11 mm. ; Claiborne sand. Nearly typical form. 



13. A bra nit ens Lea, 11 mm. 



14, 15. Cuniingia f keittensis, n. sp., Keitt's Ravine, S. C 173 



U. S. Nat. Mus. 

 Fig. 14, 30 mm. +. 



14 a, a hinge of same, showing broad "pit" bounded 

 anteriorly by a lamelliform, radiating, cardinal tooth, be- 

 fore which is a very strong, undivided cardinal ; showing 

 also faint posterior lateral. 



15. 35 mm., showing remarkable Strigilla-Wkit anter- 

 ior sculpturing of shell. 

 16. AVt'zV/^ wmvV Aldrich, 4 mm. ; Claiborne sand 174 



