50 BULLKTIN 9 24^ 



P. sfamijieus Aid., Bull, i, Geol. Surv. Ala., pp. 50, 53, 57, 58, 



1886. 

 PecUmculiis sp., Harris, Bull. Amer. Paleont., vol. i, p. 167. 



Conrad's original descriptioji. — "Shell suborbicular, thick, 

 convex; oblique, with rather obscure radiating striae, and mi- 

 nute intervening lines ; umbo convex, beaks distant, rather 

 prominent and pointed ; cardinal teeth large ; truncated in the 

 center by a rectilinear line ; cavity capacious ; margin crenate. 

 Length i^ in." Conrad's specimen was from Claiborne, Ala. 



Grave doubt is felt as to the exact equivalency of all the 

 lyignitic specimens with this species. Yet there seem to be 

 no fixed or constant differences upon which to found a new 

 species. 



Localities. — Alabama : Nanafalia ; Tuscahoma Landing ; 

 Hatchetigbee ; Gregg's Landing ; Bell's Landing, 

 four miles above Hamilton Bluff. Georgia : Ft. 

 Gaines ; bed 8, p. 33. 



Type. — Academy Natural Sciences, Philadelphia. 



Specimens figured. — Fig. 5, Yellow Bluff; C. U. collection. 

 Fig. 6, Gregg's Landing ; Harris' collection. 



Nucula ovula, PI. 8, fig. 7. 



Syn. See vol. i, Bull. Amer. Paleont., p. 168. 



Localities. — Alabama : Woods Bluff ; Nanafalia ; Gregg's Land- 

 ing ; Choctaw Corner ; four miles above Hamil- 

 ton Bluff, Alabama River. 



Specimen figttred. — Woods Bluff ; Paleont. Museum, Cornell 

 University 



Nucula magnifica Con. 



Aldrich reports this species from Bell's and Gregg's landings, 

 Alabama, but our collecftions contain no specimens from these 

 or other Lignitic localities. 



Leda elongatoidea, PI. 8, figs. 8, 9. 



Syn. L. elongatoidea Aid., Bull. Amer. Paleont., vol. i, p. 69, pi. 6, fig. 

 2, 1895. 

 Nan L. elongatoidea? Har., Bull. Amer. Paleont., vol. i, p. 169, pi. 

 14, fig. 10. 



Aldrich' s original descriptio7i. Op. cit. p. 6p. 



Aldrich' s type specimen is slightly broken anteriorly and pos- 



