6o Bulletin 9 252 



teeth in the left valve double, the lower one the largest, very- 

 strong and erect. 



"A(?^a///)/.— Hatchetigbee Bluff, Ala." 



Type. — Hatchetigbee Bluff, Aldrich's colledlion. 



Specimens figured. — Hatchetigbee Bluff, Aldrich's colledlion. 



Cardium hatchetigbeense? Pl. 12, fig. 3. 



This specimen from Sabinetown, at first seemed quite different 

 from hatchetigbeense, since it is nearly double the dimensions of 

 the latter, the spaces between the ribs are often sharply striate 

 transversely, and the ribs are regularly pitted where spines have 

 been dislodged. These spines must have been very large on the 

 posterior slope. By carefully examining Aldrich's types their 

 pits can be found in certain places. The size of this shell reminds 

 one at once of C. harrisi Vaughan, but by placing the type of 

 the latter by the side of this specimen, many distinguishing char- 

 adters appear. 



Cardium tuomeyi, Pl. 12, fig. 4. 



Syn. Cardium vicksburgense Tuomey, 2d Biennial Rep't, p. 269, 1858. 

 Cardium tuomeyi Aid., Bull, i, Geol. Surv. Ala., Aid., 18S6, p. 40, 

 pl. 4, figs. 13, a. 



Aldrich's original descriptio7i. — "Shell ovate, thick through 

 the umbones ; ribs numerous, about forty-four in number, flat- 

 tened above and indented with scars of spines ; spaces between 

 the ribs much smaller than the ribs themselves ; a few small, 

 scattered spines near the beaks, which are central and raised ; 

 muscular scars strongly marked. 



''Locality. — Nanafalia, Ala. 



"Differs from the previous species described by its more 

 numerous ribs, more rounded form, smaller spines and thicker 

 shell." 



Casts indicate that this species grew to a fairly large size 

 in the vicinity of Ft. Gaines, Ga. 



Type. — Aldrich's colledtion. 



Specimens figured. — Paleont. Museum, Cornell University. 



Coralliophaga priman. sp. Pl^ 13, figs. 4, 5. 



Specific charaB eristics. — Size and general form variable, the 

 adult elongate form being shown by the figures ; surface with 



