54 Bulletin 4 168 



The sharp posterior, deeply sunken and sharply defined lunule, 

 great angle formed by the junction of the two rows of teeth and 

 coarsely crenulated margin, serve to distinguish the species. 



This is doubtless the "tV. magnifica''' Aid., Bull. No. i, Geol. 

 Surv. Ala., 1886, p. 61. 



Localities. — Alabama: Black Bluff, Tombigbee river; y^ mi. 

 W. of Graveyard hill; i mi. N. of Allenton, 

 Station 264, Prairie Cr., Wilcox Co. (U. S. Nat. 

 Mus. coll). 



Type. — Paleontological Museum, Cornell Univ. 



Nucula ovula, PI. 4, fig. 5. 



Syn. N. ovula Ivea, Cont. to Geol., 1833, p. 80, pi. 3, fig. 59. 



Lea's original description. — "Shell ovate, oblique, inflated, very 

 inequilateral, transversely striate, longitudinally and very minute- 

 ly ribbed; substance of the shell thin; lunule large, not deeply 

 impressed; beaks pointed, recurved; anterior series of teeth 

 short — posterior series long; fosset nearly direct; cavity of the 

 shell deep; margin very minutely crenulate; nacre pearly. 



" Diam. .3, length .4, breadth .5, of an inch." 



This was described from the Claiborne sand. 



Locality (Midway stage). — Alabama: Dale's Branch, Oak Hill. 

 7>/^.— Phila. Ac. Nat. Sci. 



LED A. 



Leda milamensis, PI. 4, fig. 8. 



Syn. L. milamensis Har., Proc. Ac. Nat. Sci. Phila. , 1895, 

 p. 47, pi. I, fig. 4, 



Harris' origi?ial description. — "General form as figured; surface 

 covered with fine concentric striae execpt near the anterior margin 

 where it is smooth and polished; diameter from beak to base great, 

 and the shell here much inflated; posterior remarkably narrow 

 and flattened. 



''Locality. — Smiley's Bluff, Brazos river, two miles above the 

 mouth of Pond Cr. 



''Geological horizon. — Midway Eocene. 



"Type specimen. — Texas State Museum." 



The figure herewith given is much more typical of the species 

 than the one given in the Phila. Ac. Proc. The anterior half or 

 two-thirds of the shell is very much inflated and is sometimes 



