56 PALEONTOLOGY OF NEW JERSEY. 
(the specimens being all imperfect), subangular on the periphery above the 
last one, which is biangular and obliquely flattened on the periphery, the 
lower angle less strongly marked and less prominent than the upper one, 
and both crossed by strong, rounded, vertical folds, which become obsolete 
just below the lower angulation, but form node-like prominences on them; 
base of the last volution strongly and rapidly contracted from the lower 
angulation, forming a short anterior prolongation or beak; the columella 
formerly quite slender, judging from the small perforation remaining in 
the cast, and destitute of folds or ridges; aperture large, angularly ovate, 
oblique and pointed below and strongly angular on the outer side; surface 
of the shell, except the vertical folds, unknown. 
This species is a very good representative of P. Newberryi M. & H., 
from the upper Missouri Cretaceous,’ but differs specifically im its general 
form, being proportionally longer above and shorter below the point of 
greatest diameter, and also in the biangular character of the periphery. 
This biangular character of the volutions exists to a greater or less degree 
on all the whorls, but is concealed somewhat on the upper ones by the suc- 
ceeding volution extending to the lower angulation, thereby rendering it a 
little obscure. The snell is so very distinet in form from any other in the 
New Jersey beds that it is not necessary to institute comparisons with them. 
Formation and locality: In the Lower Green Marls of the Cretaceous at 
Crosswicks Creek, New Jersey. In the collection at Rutgers College and 
at Columbia College, New York City. 
Genus NEPTUNELLA Meek. 
NEPTUNELLA MULLICAENSIS, n. sp. 
Plate Iv, Figs. 20, 21. 
Shell rather above a medium size for the genus, short-fusiform in outline, 
the spire forming about one-half the length of the entire shell; volutions from 
four to five in number, compactly ventricose in the cast, most ventricose 
above the middle, and somewhat abrubtly wedge-formed below; sutures dis- 
tinct; columella strong; as shown by the cast, leaving a large cavity, but desti- 
tute of plaits or folds as far as can be determined; aperture narrow and 
‘U.S. Geol. Surv. Terr., vol. 9, Invert. Pal. p. 346, Pl. xxx1, Figs. 6a and Ge. 
