158 Bulletin 31 158 



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

 gonla figure most nearly resembles the prevalent tj'pe at this 

 localit3\ However, we have found a specimen or two herewith 

 figured corresponding more nearlj' to veneriformis. It is quite 

 possible that even triangulata and subtrig07iia 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. 



i^<?rz>^7?.— 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 ; palli al sinus and muscular scars of good 

 dimensions though rather dimly marked ; exterior smooth except a few 

 concentric stride 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 onh'. Fig. 5, 

 pi. 49, shows that in common wdth raveneli 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 — Psavimobia-VC^o. — but 

 thus far we have observed no radiating lines. 



Type.—V2i\&on\.. Mus. C. U. 



Horizon. — St. Maurice Eocene. 



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



Localities. — Smithville, Texas ; Lisbon, Ala. ; 6 miles N. 

 W. of Orangeburg, S. C. 



