173 St. Maurice and Claiborne Pelecypoda 173 



Abra nitens Lea, PI. 52, Figs. 11-13 



Egeria niteiis Lea, Cout. to Geol., 1833, p. 51, pl.i, fig. 19. 

 Amphidesma fcl/iriula Con., Amer. Jr. Sci., vol. 1, 1846, p. 397, pi. 4, 



fig- 5. 

 Abra nitens teUiniila Con., Am. Jr. Conch., vol. i, 1865, p. 5. 

 Tellina fi if ens Gr&^o., pars, Mon. Faun. Eoc. Ala., 1890, p. 223. 

 Sy>idesi)iya tellinula Cossm., Notes Compl., 1893, p. 8, pi. i, figs. 7,8. 

 Abra nitens Dall, Trans. Wag., Ill, 1900, p. 997. 



Lea's original description. — Shell subelliptical, obliquely transverse, 

 inequilateral, the anterior portion being much the larger, rather compressed, 

 smooth and shining; substance of the shell very thin; posterior .slope 

 lightly folded ; beaks elevated, pointed ; cicatrices scarcely perceptible ; 

 cavity of the shell not deep, of the beaks rather deep ; margn entire. 



Diam. .1, Length 5-20, Breadth 6-2oths, of an inch. 



At first view this species might be taken for the inflata. On exam- 

 ination it will be easily distinguished by its polish, its obliquity, and par- 

 ticularly the great disparity of the size of the anterior portion of the shell, 

 the inflata being nearly equilateral. 



This species varies considerably in outline as may be seen 

 by examining the figures herewith given. 



Type. — Phila. Acad. Nat. Sci., Nos. 5092 and 5093. 



We have seen this species only from the Claiborne sand at 

 Claiborne, Ala. 



Cumingia ? keittensis, n. sp., PI. 52, Figs. 14, 15 



PI. 53. Fig. I 

 Specific characterizatioyi . — Form somewhat angular-ellip.si- 

 oidal as illustrated ; substance of shell moderately thick, surface 

 in general marked by well-defined concentric striae, anterior 

 strongly characterized by down-dipping, curved, Strigilla-\\\i^ 

 unconformable ridges; posterior area more or less marked off from 

 the general shell surface by an umbonal ridge ; teeth (so far as 

 can be determined by the left valve) showing one strong cardinal 

 tooth, posterior to which is a longer lamelliform, radiating tooth 

 which bounds the resilium pit anteriorly; pit bounded behind, 

 not very sharply, by a slight radiating ridge above which a sharp 

 diagonal gash indicates the position of a submerged ligament ; 

 posterior lateral faint, short ; anterior lateral short, at distal 

 termination of lunular area ; lunule narrow, cordiform, deeply 

 sunken under the beak ; escutcheon not sharply defined. 



