522 CRETACEOUS PALEONTOLOGY. 



Remarks. The type specimen of this species, which is the 

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

 clearly a member of 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 Wenonah sand, 

 from which formation it is quite probable that the specimen was 

 collected. 



Formation and locality. Wenonah sand (?), Marlboro, 

 (Whitfield.) 



Geographic distribution. New Jersey. 



Genus PERIPLOMYA Schumacher. 

 Periplomya elliptica (Gabb). 



Plate LVIL, Figs. 8-11. 

 1861. Anatina 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- elliptic a Johns., Proc. Acad. Nat. Sci. PhiL 



(1905), p. 13. 



