120 PALEONTOLOGY OF NEW JERSEY. 



CYPR^ID^. 



Genus CYPR^A Linnseus. 



Cypk^a (Aeicia) Mortoni. 



Plate XV, Figs. 1-3. 



Cyprce, Mortoni Gabb : Jour. Acad. Nat. Sci., PMla., 2d ser., vol. 4, p. 391, PI. 

 Lxviii, Fig. 8 in text, 9 on plate ; Synopsis, p. 48 ; Meek, Check List Cret. 

 and Jur. Foss., p. 19; Geol. N. J., Newark, 1868, p. 729. 



Mr. Gabb described this species principally from internal casts obtained 

 from Prairie Bluff, Alabama, at the same time recognizing it in a cast from 

 New Jersey. That specimen I have before me, but it is so very imperfect 

 that only the generic features of the shell are retained beyond proofs of 

 its small size and evidence that it is an adult individual. Being an internal 

 cast, but few features of a shell of this kind can be retained. The speci- 

 men is about five-eighths of an inch in length and broadly ovate in outline ; 

 the spire is flat and the cast most ventricose and largest about one-third of 

 the length from that end, with the slightest indication of an angularity at 

 the point of greatest diameter on the outer half of the last volution. The 

 outer lip shows the infolding to a slight extent, but no indications of the 

 fine crenulations of the lip nor of the opposite side of the aperture as men- 

 tioned in the original description is visible, as the substance of the cast 

 which would have filled the apertural slit is not preserved, hence they could 

 not be retained. The exterior of the cast is entirely smooth, as must neces- 

 sarily be the case in a cast of a shell of this genus. 



As this is the only cretaceous Oi/prcsa found in the New Jersey beds 

 there can be no question as to its identity; and as the specimen is altogether 

 too imperfect for comparison with those from the more southern localities, 

 not affording any specific features, it will be necessary to retain the name 

 given to it by Mr. Gabb until other material can be obtained for compar- 

 ison with that one to satisfactorily determine whether it may be the same 

 or not. 



Formation and locality: In the blue marls of the Lower Greensands, 

 Burlington County, New Jersey. 



