58 "PALEONTOLOGY OF NEW JERSEY. 
Family TRITONID. 
Genus TRITON Montfort. 
TRITON (EPIDROMUS) PRACEDENS, 0. sp. 
Plate v, Figs. 6, 7. 
Shell small and moderately slender, spire elevated, longer than, or 
about equal to, the length of the body volution and anterior beak, as 
viewed from the back of the shell; apical angle of the spire between 30° 
and 35°; volutions quite ventricose, with strongly marked sutures; prin- 
cipal varices occurring at about every two-thirds of a volution, but with 
secondary varices between, visible on the casts but not definitely enough 
to give a positive idea of their exact number, yet apparently three on 
the body volution; each of the principal varices marked by about seven 
well defined depressions on the back, indicating that number of spiral 
ridges on the shell and protuberances on the inner margin of the lip; aper- 
ture of medium size, semi-lunate, the outer lip only moderately expanded, 
columella slender, and anterior beak of moderate length; number of volu- 
tions not definitely ascertained, as the specimens are imperfect. 
The species appears to have been a true Epidromus, and had a 
length of a little more than 14 inches. The varices are quite strongly and 
distinctly marked, leaving no doubt of its generic relations. It is the only 
species of the type yet discovered in the Cretaceous of New Jersey, and on 
that account, as well as being one of the earliest of its kind to appear in 
the geological record, is quite interesting. Of course, like all the New 
Jersey Cretaceous Gasteropoda, it is represented only by internal casts’ 
and is imperfect in many of its features, the upper volutions being invari- 
ably absent, with more or less of the anterior beak and canal; still, their 
features are sufliciently preserved to serve all purposes of identification. 
Formation and locality: In the dark green layers of the Lower Green 
Marls at Mullica Hill, New Jersey. Collected for the State Survey by Dr 
N. L. Britton. 
