216 PALEONTOLOGY OF NEW JERSEY. 
shell marked, especially on the body volution, by regular, even, flattened, 
longitudinal or vertical costes, which are formed by the fasciculation of the 
growth lines and which are scarcely recurved on the sulcus below the suture, 
but are carried forward in a broad sweeping curve across the body of the 
principal volution, nearly to the slender beak, before they are again bent 
backward. 
This shell is more slender than P. altispira herein described, and has 
a longer anterior beak. The volutions differ very materially in form and 
also in proportion. On a gutta-percha cast made in a natural mold of one 
specimen showing the exterior features the upper volutions appear to have 
possessed stronger vertical folds; but the feature is problematical; and may 
be the result of accident. 
Formation and locality: In the upper layer of the Upper Green Marls, 
at Shark River, New Jersey. From the collections of the Am. Mus. Nat. 
Hist. and Rutgers College, New Jersey. 
PLEUROTOMA (SURCULA ?) ALTISPIRA, N. sp. 
Plate xxx, Figs. 10-13. 
Shell much elongated, spire much more than one-half the length of the 
shell, very much elevated, consisting of six or more volutions in the cast. 
Volutions moderately convex, not angulated, but in the cast marked by a 
rather broad elevated band at the base of each, except, perhaps, the outer 
or dorsal portion of the last one. Body volution and beak forming fully 
half the entire length. Aperture only moderately large, pointed below and 
rounded on the outer side. Columella slender and pointed at the base. 
Beak short. Surface of the shell, so far as can be ascertained, marked only 
by fine lines of growth, which are strongly curved forward in crossing the 
body volution, being returned again, gently, after passing the largest part. 
This species differs in the form of the volution from any other form in 
the New Jersey beds. It corresponds in shape with P. elaborata Conrad 
from the Claiborne sands, but is three times the bulk of the largest specimen 
of that species yet observed in the many collections which I have seen from 
that locality. | 
Formation and locality: In the upper layers of the Upper Green Marls, 
at Shark River, New Jersey. Collection at Rutgers College. 
