722 CRETACEOUS PALEONTOLOGY. 



as these markings are exceedingly faint upon the specimen and 

 may be easily overlooked. 



Formation and locality. Navesink marl, Crosswicks' Creek 

 (Whitfield). 



Geographic distribution. New Jersey. 



Hostel laria fusiformis Whitfield. 

 Plate LXXXIIL, Figs. 16-17. 



1892. Rostellaria fusiformis Whitf., Pal. N. J., vol. 2 (Monog, 

 U. S. G. S., vol. 18), p. no, pi. 13, figs. 14-15. 



Description. "Shell small, slender and fusiform; spire ele- 

 vated and slender, the apical angle being about 20 or 25 ; volu- 

 tions slender, slightly convex on their exposed surfaces ; four 

 only preserved in the cast, but there have been four or five more 

 above, making eight or more in all; body volution greatly pro- 

 longed in front, forming a long slender beak with a proportion- 

 ally strong axis, leaving quite a good-sized axial cavity in the 

 cast; aperture long and narrow, pointed above and below, the 

 upper canal being extended upon the preceding volutions to an 

 unknown extent; volutions marked by numerous, closely-ar- 

 ranged, vertical folds, 12 or more to the whorl." (Whitfield.) 



Remarks. This species may be distinguished from R. curia 

 by its more slender form. It is known only in the condition of 

 internal casts. 



Formation and locality. Navesink marl, Crosswicks Creek 

 (Whitfield). 



Geographic distribution. New Jersey. 



Family CYPRAEIDAE. 



Genus CYPRAEA Linneus. 



Cypraea mortoni Gabb. 



Plate LXXXIV, Figs. 1-2. 



1860. Cypraa Mortoni Gabb., Jour. Acad. Nat. Sci. Phil., 2d 

 ser., vol. 4, p. 391, pi. 68, fig. 9. 



