234 PALEONTOLOGY OF NEW JERSEY. 
cast showing irregular undulations transversely, and very strong indications 
of an apertural slit of undetermined extent near the middle of the volutions 
by the existence of a broad undefined elevation with a median impression 
on the east. 
This species differs from ZL. perlata Con. in wanting the flattening on 
the upper surface of the volution in its greater elevation, stronger volutions, 
and in the position of the slit. It is perhaps the most bulky gasteropod shell 
in the New Jersey Tertiary Marls, having a diameter at the base of nearly 
54 inches in its slightly flattened condition, and would have a height, if 
complete at the apex, of fully 4 inches. I cannot conceive of any distor- 
tion or compression which would produce from this one the form of volu- 
lution which characterizes L. perlata. 
Formation and locality: In the upper layers of the Upper Green Marls 
at Mrs. Haight’s pits, Bayley’s Corners, Wall Township, New Jersey. Col- 
lection at Rutgers College. 
LEPTOMARIA PERGRANULOSA, Nl. Sp. 
Plate xxxvi, Figs. 3-6. 
Shell of medium size, very broadly conical in form, having an apical 
angle of about 125°, and apparently uncompressed; volutions five or more, 
flattened on the surface in the direction of the spire, or with but a very 
slight convexity between the suture lines; sutures very distinct but not at 
all marked; base concave, the lower surface of the volution very gently 
convex between the acutely angular periphery and the margin of the um- 
bilical cavity, the latter feature being of moderate width and open to the 
apex of the spire, showing all the volutions within it; aperture transversely 
lenticular in form, being acute at the outer and inner margins, and twice as 
wide as high; slit in the aperture narrow, thread-like, situated nearly mid- 
way between the upper and lower margins of the volution, or a very little 
above the middle of the width; surface of the shell, as obtained from an 
external imprint, entirely granulose or cancellate-granulose, formed by 
fine, deep, longitudinal lines and nearly equally strong transverse lines. 
These latter arch gently backward from the upper edge of the volution to 
the line of the slit, and below it are directed forward to nearly the same 
