Geological Survey of Alabama. 88 



KELLIELLA ? BCETTGERI, n. sp. PI. 3, figs. 15, 15a. 



Very small, orbicular, tumid, inequilateral, umbo turned anteriorly ; 

 a cordate lunule is defined by an impressed line ; surface closely and reg- 

 ularly covered with concentric ribs ; hinge of the right valve with two 

 diverging cardinal teeth below the umbo, and a horizontal one which is 

 lamelliform before and beneath them ; left valve with a short, oblique 

 tooth below the umbo, and anteriorly with a horizontal S-shaped one; 

 anterior adductor long ; margin entire. 



Locality. Jackson, Miss.; common. 



The pallial line is apparently simple. The shell in its dentition resem- 

 bles somewhat the genus Lutetia, Desh., of the Paris basin, but on com- 

 parison with two species of this genus which I have, proves to be different. 

 The genus Kelliella, Sars., as far as I am aware, is not a known fossil. 

 I have no specimens of KellieUa, but according to its description and 

 figure, I am inclined to put this small, remarkable Jackson shell into 

 this genus. 



MODIOLARIA ALABAMENSIS, n. sp. PL 3, fig. 19. 



Rhomboidal, thin ; the small anterior and the large posterior part with 

 radiating ribs, leaving the middle of the shell and the umbo smooth ; 

 hinge edentulous, anterior hinge-line notched. 



Locality. Claiborne, Ala.; "Lowest Claibornian." 



The figured type-specimen is a young shell. 



CORBULA ALDRICHI, Meyer. PL 1, fig. 21. Am. Jour. Sci., XXX., 

 1885, p. 67. 



Rounded trigonal ; ventricose ; posterior side carinated ; beak small, 

 curved anteriorly, in the left valve nearly in the middle ; right valve 

 briefly rostrated ; in both valves the umbonial part is without concentric 

 ribs, but with impressed, radiating lines the ventral part with concentric 

 ribs. 



Locality. Wood's Bluff, Ala. 



The radiating lines cut only the first ribs and disappear completely at 

 the ventral part. The species is similar to Corbula gibbosa, Lea., but dis- 

 tinguished mainly by the smooth umbonial part and the radiating lines. 



CORBULA PEARLENSIS, n. sp. PL 3, figs. 16, 16a. 



Rather small, rounded, inflated ; margin rounded anteriorly, truncated 

 posteriorly ; beaks very small, turned anteriorly ; surface of both valves 



