144 BuivLKTiN 31 144 



Localities. — Claiborne, Ala. Neuse River, N. C. ? 



Meretrix cornelli Harris, PI. 46, Figs. 1-2 



M. cornelli Harris. These Bulletins, vol. i, 1895, p. 49, pi. i, fig. 5. 



For original characterization, see the Bulletin referred to 

 above. Of this largeand almost Z>(7^z;zza-like species three spec- 

 imens are known to the writer, one in the U. S. Nat. Museum, 

 collected by L. C. Johnson, and two now at Cornell, including the 

 t5''pe, collected by Harris. 



All specimens are from the Claiborne "sand." 



Meretrix poulsoni Conrad, PI. 46, Figs. 3-5 



Cy th erea poulsoni Qon., Foss. Sh. Tert. Form., Aug., 1833, p. 36, 

 Dione poulsoni Con., Amer. Jr. Concli. , vol. i, 1865. p. 6. 

 Cytherea poulsoni &.& Greg., Mon. Faun. Eoc. Ala., 1890, p. 216, pi. 

 34, figs. 11-13. 



Conrad's original description. — Shell ventricose, cordate, with fine 

 concentric striae ; beaks prominent, curved towards the lunule, which is 

 heart-shaped : cavity of the beaks very deep. Diameter about two inches, 

 the length and breadth being nearl}- equal. 



The beaks are not unlike those of Isocardia, and the shell resembles 

 C. Say ana, [nobis) but the latter wants the concentric striae. I dedicate this 

 shell to my kind friend, Mr. Charles A. Poulson. Locality. — Claiborne, 

 Ala. 



This species represents the limiting form of the nuttali stock 

 so far as deepening and shortening up of the valves is concerned , 



7)//)^.— Phila. Acad. Nat. Sci. 



Horizon. — Claiborne Eocene. 



Specimens Jigtired. — Paleont. Mus. Cornell Univ. 



Localities. — Claiborne, Ala. Certain deep valves from the 

 calcareous sandstones about Newbern, N. C. and Shell Bluff, 

 Ga, . seem to belong to species close to poulsoni. 



Meretrix ? vespertina Conrad, PI. 46. Fig. 6, 



Venus vespertina Con., U. S. Mex, Bdy. Surv. Rep., 1857, pt. 2, p. 

 162, pl. 19, figs. 5, 5 a. 



Conrad's original description. — Subtriangular, inequilateral, convex ; 



