120 PALEONTOLOGY OF NEW JERSEY. 
CYPRAIDA. 
Genus CYPRAVA Linneus. 
CyPrR®A (ARICIA) MORTONI. 
Plate xv, Figs. 1-3. 
Cypre Mortoni Gabb: Jour. Acad. Nat. Sci., Phila., 2d ser., vol. 4, p. 391, Pl. 
LXVUl, 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 Cyprea 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. 
