798 CRETACEOUS PALEONTOLOGY. 



the shell is marked by stronger vertical folds. The columellar 

 cavity of P. macfarlandi, however, is nearly as broad as that of 

 T. elevata. The casts described by Whitfield as Rostellaria curta 

 also resemble those called Turbinopsis elevata by the same author, 

 and at least one of the type specimens of that species is certainly 

 identical with T. elevata. 



Although the casts under consideration are certainly not mem- 

 bers o>f the genus Turbinopsis, they will be allowed to remain 

 where they were originally placed by their author, because their 

 reference to any other genus is just as unsatisfactory. Not until 

 specimens preserving the external features of the shell are secured 

 can their relations be properly determined. 



The species is closely allied to T. curta, and three of the figures 

 of T. elevata, published by Whitfield, are said by Johnson to rep- 

 resent the other species, leaving but a single specimen as the type 

 of the species. 



Formation and locality. Navesink marl, near Crawfords Cor- 

 ner (i26 7 ), Crosswicks Creek (149), Mullica Hill (169). 



Geographic distribution. New Jersey. 



Turbinopsis ? curta Whitfleld. 

 Plate XCVIIL, Figs. 4-5. 



1892. Turbinopsis curta Whitf., Pal. N. J., vol. 2 (Monog. U. 



S. G. S., vol. 1.8), p. 102, pi. 12, figs. 3-6. 

 1905. Turbinopsis curta Johns., Proc. Acad. Nat. Sci. Phil. 



(1905), p. 26. 



Description. "Shell small, turbinate, with a short spire, show- 

 ing 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, indicating a large 

 umbilicus in the shell; aperture elliptical, sharply angular below 

 and sharply rounded above-; oblique and more 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 ; 



