Geological Survey of Alabama. 79 



BOVICORNU, n. gen. 



Shell minute, subulate pointed, spirally contorted. 



BOVICORNU EOCENENSE, n. sp. PL 3, fig. 2. 



Smooth, somewhat inflated at the closed end ; section circular. 

 Locality. Red Bluff, Miss. 



LAMELLIBRANCHIATA . 



ARC A INORNATA, n. sp. PL 1, fig. 24. 



Trapezoidal ; anterior side truncated, flat ; beak small ; ligament area 

 very low ; teeth smallest toward the middle ; covered with indistinct con- 

 centric lines ; margin entire. 



Locality. Claiborne, Ala. 



Resembles Area Icevigata, Caillat,* from the Paris basin, but is less 

 oblong. 



TRIGONOCCELJA LEDOIDES, n. sp. PL 1, fig. 20. 



Convex, ovate ; posterior side carinated ; hinge narrow, divided by a 

 minute pit ; about eight teeth on each side ; more vertical near the pit, 

 more horizontal near the end ; surface with concentric lines of growth 

 crossed by indistinct radiating lines, which are not perceptible on the 

 umbo ; beak turned toward the carinated side ; the muscular impression of 

 this side is oval and less distinct ; an. elevated radiating line passes along 

 its side ; margin entire. 



Locality. Claiborne, Ala. 



I found only the figured specimen, and this seems to be somewhat worn. 



LEDA MATER, Meyer. PL 3, fig. 20. Am. Jour. Sci., XXIX., 1885, 

 p. 460. 



Elliptically transverse, convex ; produced and truncate behind ; 

 strongly inequilateral ; covered with concentric ribs and posteriorly with 

 three radiating ribs ; teeth diminishing in size toward the fosset ; channel 

 interrupted by a callus ; margin entire. 



Locality. Jackson, Miss. Not rare. 



The concentric ribs are quite regular on the umbonial part of the shell; 



* T>esh. An. s. vertdb. L, p. 905, pi. 68, tigs. 23-26. 



