774 CRETACEOUS PALEONTOLOGY. 



absence of the external characters of the shell, the generic posi- 

 tion of the species is somewhat doubtful, but it may be allowed 

 to remain, for the present, where originally placed by Whitfield. 

 The shell has much the appearance of the upper volutions of a 

 species of Rostellites. 



Formation and locality. Navesink marl, near Walnford 

 (Whitfield). 



Geographic distribution. New Jersey. 



Family VOLUTIDAE. 



Genus VOUJTODERMA Gabb. 



Volutoderma woolmani Whitfield. 

 Plate XCL, Figs. 18-19. 



1893. Volutoderma Woolmani Whitf., The Nautilus, vol. 7, 



pp. 37 and 51, pi. 2, figs. 4-5. 

 1905. Volutoderma zvoolmani Johns., Proc. Acad. Nat. Sci. 



Phil. (1905), p. 25. 



Description. "Shell, as shown by the internal cast, somewhat 

 more than an inch in length, and having a diameter of the body 

 volution of seven-sixteenths of an inch in the cast, being more 

 slender than any species yet described. Volutions largest just 

 below the suture and attenuate below, forming a moderately 

 long beak; marked in the upper part by eight comparatively 

 strong vertical plications, which are obsolete below. Columella 

 marked by three very distinct folds or ridges, the lowest of 

 which is the strongest. These are well marked on the inside 

 of the upper volutions." (Whitfield.) 



Remarks. This species is a very distinct one, and differs from 

 other members of the genus in the New Jersey faunas in its 

 smaller size and more slender form. 



Formation and locality. Merchantville clay-marl, Lenola 



(163). 



Geographic distribution. New Jersey. 



