MIOCENE MOLLUSCA AND CRUSTACEA. i 
label provisionally left with the specimen previous to the description and 
name as published. The shell may be cha ‘acterized as follows: 
Shell small, barely exceeding 1 inch in length by scarcely two-thirds of 
an inch in height, and extremely delicate in texture; very depressed convex 
and very slightly bent posteriorly; beak small, appressed, and nearly sub- 
central, being a little nearest to the posterior end. General outline trans- 
versely subovate, widest anteriorly and broadly rounded, the posterior end 
narrower and obtusely pointed, postero-cardinal margin more rapidly declin- 
ing than the anterior. A faint postero-umbonal ridge exists a little within 
the margin of the shell. Surface of the valve marked by fine concentric 
lines of growth parallel to the margin of the shell. In the interior the 
muscular markings are quite faint, the scars very light, and only of mod- 
erate size; pallial line very faint, somewhat deeply excavated. Hinge 
narrow, two small slender teeth under the beak; laterals moderately large, 
the antero-lateral quite distinct. 
Locality; As stated above, there is only the one single authentic valve 
known; this is labeled Shiloh, N. J., and I have seen no evidence of its 
existence from any of the other Miocene localities within the State or else- 
where. The specimen is from the collection of the Academy of Natural 
Sciences at Philadelphia. Externally the shell bears a striking resemblance 
to Tellina lusoria Say, from the Miocene beds at Yorktown, Va., but the 
lateral teeth in this are very pronounced, especially the anterior one. 
TELLINA (ANGULUS) DECLIVIS. 
4 Plate xIv, figs. 4-6. 
Con nr 4) 
Tellina declivis Say: Jour. Acad. Nat. Sei., Ist ser., vol. 7, p. 131; Conrad, Mioe. Foss., 
‘ 
p. 35, Pl. x1x, fig. 1; Heilprin: Proc. Acad. Nat. Sei., 1887, pp. 401 and 403. 
Tellina (Angulus) declivis (Say) Conrad: Proc. Acad. Nat. Sci. Phil., 1862, p. 573; 
Meek, Check List Miocene Foss., p. 10. ; 
lod 
“Shell triangular, convex, thin, with minute, regular concentric lines; 
anterior side rather long, and very regularly rounded at the extremity; pos- 
terior side short; umbonial slope straight, oblique, angulated; posterior 
extremity obtusely angulated; lateral teeth distinct, but minute.” (Conrad.) 
