56 PALEOi^TOLOGY OP NHW JURSEY. 



(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. Newherryi M. & H., 

 from the upper Missouri Cretaceous, ^ but differs specifically in 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. Tlie snell is so very distinct 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 Glreeu 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. Sary. Terr., vol. 9, Invert. Pal. p. 346, PI. xxxi. Figs. 6a and Gc. 



