102 PALEONTOLOGY OF NEW JERSEY. 



Formaflon and locality : In the blackish green marls of the Lower Marl 

 Beds at Crosswicks, New Jersey. In the collection at Rutgers College. 



TUEBINOPSIS CURTA, n. Sp. 



Plate XII, Figs. 3-6. 



? Lunatia obtusivolva (Gabb) Conrad: Am. Jour. Conch., vol. 5, p. 45, PL I, 

 Fig. 11. 



S-hell small, turbinate, with a short spire, showing in the cast only 

 about three volutions in all, the last of which forms the great bulk of the 

 shell ; volutions largest at the top and contracted below to the sharp base 

 bordering the umbilical cavity; this latter feature proportionally wide, indi- 

 cating a large umbilicus in the shell; aperture elliptical, sharply angular 

 below and sharply. rounded above; oblique and moi'e rounded on the outer 

 than on the inner side; columellar lip not showing evidence of a tooth on 

 the cast, and probably destitute of such appendage; casts showing no indi- 

 cation of vertical folds or revolving lines. 



This species differs from all the others in the low spire, aiid the short, 

 broad form of the shell, by which features it may be readly distinguished 

 from them. Conrad's figure above referred to seems almost as if it might 

 have been made from one of the specimens figured on our plate, the spire 

 being only a little lower, though there is doubt concerning it. 



Formation and locality : In the Lower Grreen Marls at Crosswicks, New 

 Jersey. Collection Acad. Nat. Sci., Phila., and from the same position near 

 Trenton Falls, New Jersey. Collection at Columbia College. 



TURBINOPSIS ELBVATA, n. Sp. 



Plate xii. Figs. 10-14. 



Shell of moderately small size as indicated by internal casts only; 

 spire elevated, consisting of but few whorls, which in the casts are widely 

 discomiected, indicating a thick shell or whorls disconnected in the shell 

 itself, which is most probable ; volutions convex, rounded above and on the 

 periphery, but compressed and wedge-form below ; aperture elongate-ovate, 

 rounded above, but wedge-shaped below; umbilical opening, in the cast, 

 quite large, smooth, not showing any indication of the spiral tooth-like 



