Geological Survey of Alabama. 81 



MICROMERIS SENEX, n. sp. PI. 3, fig. 22. 



Small, solid ; anterior margin straight, posterior margin curved ; sur- 

 face, except the umbo, covered with coarse radiating ribs. 

 Locality. Claiborne, Ala. Stratum "g".* 



LUCINA (CYCLAS) SUBRIGAULTIANA, n. Sp. PL 3, fig. 13, 13a. 



Orbicular, very regularly rounded ; hinge teeth, two ; laterals small ; 

 margin entire ; surface covered with regular concentric waving lines, 

 crossed occasionally by orbicular lines of growth. 



Locality. Vicksburg, Miss. Lower Vicksburgian. 



Resembles very much Lucina rigaultiana, Desh.f A deep but ex- 

 tremely small lunule is in front of the beak. The lines of ornamentation 

 are less distinct at their convex summit, thus creating a somewhat erased 

 zone, which radiates from the umbo toward the posterior side of the ven- 

 tral margin. The ornamentation looks as if produced by "petits plans 

 glissant les uns au dessous des autres" 



LUCINA CHOCTAVENSIS, n. sp. PL 1, fig. 28. 



Small, suborbicular ; convex ; lunule semilunar, well defined ; cardinal 

 and lateral teeth ; anterior muscular impression relatively small ; covered 

 with concentric lines of growth. 



Locality. Vicksburg, Miss. 



Lucina papyracea, Lea, from Claiborne, is similar, but the lateral teeth 

 are obsolete. 



LUCINA SMITHI, n. sp. PL 1, fig, 23. 



Solid ; irregularly elliptical ; subequilateral ; with cardinal and lateral 

 teeth ; a small but deep luuule inside of a larger indistinct one ; surface 

 with irregular lines of growth, becoming more regular at the extremities ; 

 they are crossed by very indistinct radiating lines ; margin creuulate. 



Locality. Claiborne, Ala. 



Named in honor of Dr. E. A. Smith, Tuscaloosa, Ala. 



LUCINA BISCULPTA, n. sp. PL 1, figs. 30, 30a. 



Thin ; convex ; oval ; anterior margin truncated ; beak turned anteri- 

 orly ; lunule rather small ; impressed ; cordate ; hinge of the right valve 



* A,,,. J,w,: ti-i., XXX., 1SS5., p. 09. 



f Desh. Au. s. verteb. I., p. 031, pi. 47, figs. 28-30. 



