158 BULLKTIN 31 158 



other species. Aside from size, however, it seem that his subtri- 

 g07iia figure most nearly resembles the prevalent tj^pe at this 

 locality. However, we have found a specimen or two herewith 

 figured corresponding more nearly to veneriformis . It is quite 

 possible that even triangulata and subtrigonia should be united. 



In the anterior and posterior margins of the right valve 

 there are traces of a channelling for the reception of the thin 

 margin of the opposite valve — a beginning of lateral dentition as 

 it were (pi. 48, fig. 16). 



Type.—^o. 5098, Phila. Acad. Coll. 



Horizon. — Claiborne Eocene. 



Specimens figured. — Paleont. Mus. Cornell Univ. 



Locality. — Claiborne, Ala. 



Tellina tallicheti Harris, PI. 49, Figs. 3-5 



T. tallicheti Har., Proc. Phila. Acad. Nat. Sci., 1865, p. 51, pi. 3, fig.i. 



Harris' original description. — Size and general form as indicated by 

 the figure ; not twisted posteriorly ; thin ; posterior sub-biangulate ; an- 

 terior rounded ; beak slightly behind the center ; lateral teeth well devel- 

 oped ; posterior cardinal bifid ; pallial sinus and muscular scars of good 

 dimensions though rather dimly marked ; exterior smooth except a few 

 concentric strise on the post-umbonal slope ; umbonal ridge passes from the 

 beak to the postero-basal margin. 



Locality.- — Smithville, Tex. 



The diagnosis was based on the right valve only. Fig. 5, 

 pi. 49, shows that in common with raveiieli there is here, in the 

 left valve, a faint but definite radiating channel in the usual po- 

 sition of the "umbonal ridge". There is sometimes a tendency 

 to show a central flattening of the valves — Psa^nmobiaASks. — but 

 thus far we have observed no radiating lines. 



7)//^.— Paleont. Mus. C. U. 



Horizon. — St. Maurice Eocene. 



Specimens figured. — Paleont. Mus., Cornell Univ. 



Localities. — Smithville, Texas ; I^isbon, Ala.. ; 6 miles N. 

 W. of Orangeburg, S. C. 



