522 CRETACEOUS PALEONTOLOGY. 



Remarks. — The type specimen O'f this species, which is the 

 only one which has been observed, is poorly preserved, but it is 

 clearly a member oi the genus Anatimya rather than Pholas, and 

 is possibly identical with A. postsulcata Con. The type of Con- 

 rad's species is only a fragment exhibiting the inside of the shell, 

 but both the concentric and radiating markings are finer than 

 in Whitfield's species. In Whitfield's description of the species, 

 quoted above, the anterior and posterior extremities of the shell 

 are evidently reversed. 



The horizon of the species is stated by Whitfield to be "Lower 

 Green Marls" and the locality "Marlborough, N. J." The speci- 

 men itself is an internal cast of rather dark sand with some 

 larger, lighter colored quartz grains, and is very similar in its 

 lithologic characters tO' some portions of the AVenonah sand, 

 from which formation it is quite probable that the specimen was 

 collected. 



Pormation and locality. — Wenonah sand (?), Marlboro. 

 (Whitfield.) 



Geographic distribution. — New Jersey. 



Genus Pkeipi,omya Schumacher. 



Periplomya elliptica (Gabb). 



Plate LVIL, Figs. 8-11. 



1861. Ancatinoi elliptica Gabb, Proc. Acad. Nat. Sci. PhiL 



(1861), p. 324. 

 1864. Anatina elliptica Meek, Check List Inv. Foss. N. A., 



Cret. and Jur., p. 15. 

 1868. Anatina elliptica Con., Cook's Geol. N. J., p. 727. 

 1876. Periplomya elliptica Gabb, Proc. Acad. Nat. Sci. Phil. 



(1876), -p. 305. 

 1886. Periplomya elliptica Whitf., Pal. N. J., vol. i (Monog. 



U. S. G. S., vol. 9), p. 177, pi. 23, figs. 14-15. 

 1886. Periplomya truncata Whitf., Pal. N. J., vol. i (Monog. 



U. S. G. S., vol. 9), p. 220, pi. 28, figs. 20-21. 

 1886. Veleda nasuta Whitf., Pal. N. J., vol. i (Monog. U. S. 



G. S., vol. 9), p. 217, pi. 28, fig. 23. 

 1905. Periployma elliptica Johns., Proc. Acad. Nat. Sci. Phil. 



(1905), p. 13. 



