104 PALEONTOLOGY OF NEW JERSEY. 
Formation and locality: In the Lower Green Marls at the Neversink 
Hills, New Jersey, collected by Charles Sears, Esq. Collection at Rut- 
gers College, New Jersey. There are also small casts closely resembling 
it from J. 8. Cook’s beds at Tinton Falls, New Jersey, which would pertain 
to the Middle Marl Beds, but the identification is by no means certain. 
TURBINOPSIS PLICATA, 0. Sp. 
Plate xu, Figs. 1, 2. L 
Shell small, and known only from internal casts; spire elevated and 
erect, composed of but few volutions, probably not more than three in the 
shell; widely separated in the casts by the sutures and very rapidly increas- 
ing in size; umbilical opening very large and very distinctly marked, near 
the base of the columella, by a deep, narrow groove, indicating the pres- 
ence of a rather strong, tooth-like ridge at the base of the columella; col- 
umella concave, giving an elliptical form to the filling of the aperture which 
nearly equals one-half the height of the entire cast, and is very oblique as 
seen in front,, but from the back appears rather patulose and spreading; sur- 
face of the cast marked by numerous vertical folds or plications, which are 
quite distinct on the cast and closely arranged; the outer half of the last 
volution, however, does not retain them so distinctly. 
This species may be distinguished from others of the genus by its erect 
form, more slender spire and closely arranged but distinct vertical folds, 
which, although more numerous than those of some of them, are still much 
more distant than those on 7. Hilgardi. The spiral striz of the surface 
are not retained on the cast except very slightly on the inner surface of 
the upper volutions. 
Formation and locality: In the Lower Green Marls at Crosswicks, New 
Jersey. In the collection Acad. Nat. Sei., Phila. 
