i8 Bulletin 3 ( 70 ) 



a flattening space ; the postertor surface of the shell covered with 

 rounded, close-set, transverse folds, which terminate centrally ; 

 anterior half smooth, with a depressed space running obliquely 

 from the beak to the ventral margin ; lines of growth faint, per- 

 ceptible upon anterior ; anterior margin rounded, convex, while 

 the posterior is raised ; teeth numerous, very closely set and 

 pointed ; fosset small, with rounded cavit3^ 



Locality. — L,isbon, Ala. 



Geological horizon. — Lower Claiborne. 



This remarkable species grows nearly three inches long, and is 

 very distinct from any other tertiary form except Leda inagna 

 Lea, sp. It differs from that species, of which fragments are in 

 my cabinet, by a remarkable lanceolate shape, and length of pos- 

 terior. 



Leda sejnenoides , nov. sp. PI- 5, fig- 5- 



Shell small, thin, deeply folded ; margin entire. Shell very 

 similar to L. sevien Lea, sp., but does not have the rostrum of 

 that species ; the teeth are smaller also. 



Locality. — Lisbon, Ala. 



YOLDIA. 



Yoldia corpidentoides, nov. sp. PI. 5, fig. 9, 9a. 



Shell oblong, nearly equilateral, swollen centralh^ anterior 

 rounded, not gaping ; posterior attenuated closed on the ventral 

 part, suddenly gaping and leaving an oral opening between the 

 valves near the extremity; beaks compressed a ridge running 

 from them to posterior ; shell finely, concentrically striated ; teeth 

 numerous, equal on each side ; fosset set well under, small but 

 deep, pallial sinus moderate; a strong intestinal impression in the 

 anterior part, anterior muscular scar well defined. 



Locality. — Tuscahoma Landing, Ala. 



Geological horizon. — Bell's Landing section. 



Found in place incased in blue cla3^ 



TELLLNA. 



Tellina stibtriangularis , nov. sp. PL 5, fig. 8, 8a. 



Shell subtriangular, rather compressed, surface with close-set 

 regular concentric lines; anterior side longest, elliptically rounded, 

 posterior subtriangular ; beak smooth, cardinal teeth two ; sub- 

 triangular posterior one almost bifid, laterals strong ; pallial line 

 plainly marked, anterior muscular impression the strongest. 



Locality. — Hatchetigbee Bluff, Ala. 



