﻿NEW CRETACEOUS AND EOCENE FOSSILS. 281 



CRENELLA, Brown. 



Subgenus STALAGMIUM, Conrad. 



Crenella serica. PL 46, fig. 23. Longitudinally oblong-ovate, very ventricose, 

 finely striated concentrically and with microscopic, closely arranged, radiating lines ; 

 summit very prominent. 



Locality. — Eufaula, Barbour Co., Alabama. Tuomey's collection. 



A very small species, the first of the genus yet found in the American Cretaceous 

 formation. One other, (Stalagrnium margaritaceum, Conrad.) occurs in the Eocene at 

 Claiborne, Alabama. 



CUCULL^EA, Lam. 



Cucull^a Maconensis. PL 47, fig. 20. Triangular, subequilateral, ventricose; 

 disk flattened on the posterior side ; umbonal slope angular, almost terminal ; pos- 

 terior side subcuneate ; extremity much above the line of the base, which is profoundly 

 rounded anteriorly ; surface without radiating lines ; summit prominent, beaks 

 approximate; posterior series of cardinal teeth arched; diaphragm elevated. 



Length 5i inches ; height 4i ? 



Locality. — Chunennugga Ridge, Macon Co., Alabama. Tuomey's collection. 



This very large species is mineralized and embedded in a hard gray limestone, 

 replete with casts of undetermined shells, too imperfect in the specimens to identify. 

 This rock probably overlies the Eufaula marl. 



NUCULA, Lam. 



Nucula cuneifrons. PL 46, fig. 33. Triangular, inequilateral, convex; anterior 

 dorsal margin slightly angulated in the middle ; frontal area or lunule depressed 

 below the submarginal line, which is acutely angular, slightly concave and terminal ; 

 anterior extremity angular ; the other margins regularly rounded. 



Locality. — Eufaula, Barbour Co., Alabama. Tuomey's collection. 



Only one valve occurs, remarkable for the depressed frontal area. 



Nucula perequalis. Triangular, rather elongated, equilateral, ventricose ; dorsal 

 margins equally declining; end margins acutely and equally rounded; basal 

 margin regularly rounded. 



Locality. — Occurs with the preceeding. 



LEDA, Shumacher. 



Leda longifrons. PL 46, fig. 18. Oblong, slightly ventricose, very inequilateral; 

 hinge and basal margins parallel ; anterior end acutely rounded, posterior obtusely 

 rounded ; cardinal teeth minute and very numerous. 



Locality. — With the preceding. 



