104 PALEONTOLOGY OP 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. S. 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, n. sp. 



Plate XII, Figs. 1, 2. 



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 an-anged ; 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 T. Hilgardi. The spiral strise 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. Sci., Phila. 



