i6i St. Maurice and Claibornts Pelecypoda i6i 



fers by its elongated slender form, smaller size, and less convex valves. 

 Better specimens from Bell's Landing show a nearhMiormal hinge with long, 

 low laterals, and an ovate pallial sinus about half confluent below. It is 

 perhaps nearest to T. greggi Harris, but that species seems to be smaller, 

 more rounded behind, with the pallial sinus free from the pallial line 

 below. 



Eocene of Lisbon, Ala.— Aldrich. Also at Bell's and Gregg's Land- 

 ings, Ala. 



Not having any specimens of this species it is difficult to de- 

 termine its relationship to the species before described. In out- 

 line and horizon it suggests at once T. subequalis Con., described 

 from a cast from the Orangeburg District, S. C. (Proc, Phila. 

 Acad. Nat. Sci., 1847, P- 298. Jour. &c, vol. i. 1848, pi. 14, 

 fig. 8). However, judging from our Orangeburg material, 

 Conrad's subeqalis was most probably the internal mold of a spec- 

 imen of T. papyria. 



Tellina cynoglossula, n. sp., PI. 49, Figs. 15, 16 



Specific cliaracterization. — General appearance rather long, 

 narrow, sharply striated and sub-biangulate posteriori}^ as illus- 

 trated ; striae tending on the earlier portions of the shell to be- 

 come fewer and stronger on anterior and posterior areas, espec- 

 iall}^ from the .umbonal ridge posteriorly ; posterior angulations 

 marked within by low radii (see fig. 16); within, shining, show- 

 ing pallial sinus but obscurely. 



It seems that here we have the continuation of the Sabine 

 cynoglossa stock into the Mid-Eocene of the Gulf Coast. T. lini- 

 fera of the Jackson is more pointed. So far as outline is con- 

 cerned this would seem to be not far from T. (Mcerella f) aldrichi 

 of Dall, but the surface features are very different. Average 

 specimens, about 20 mm. in length have the appearance of those 

 figured ; larger ones, about 30 mm. in length, show an umbonal 

 ridge of a definite width, marked off from the posterior slope by 

 a depressed radiating furrow. 



In the compact, sandy clay-rock about Ft. Gaines, belong- 

 ing t*^ the St. Maurice stage, there are numerous impressions of 

 Tellinas of various shapes and sizes presumably "belonging to 



