66 PALEONTOLOGY OF NEW JERSEY. 



Odontofusus Slacki. 

 Plate VI, Figs. 8, 9. 



Fasciolaria Slackii Gabb : Proc. Acad. Nat. Sci., Phila., 1861, p. 333; 1876, p. 



383; Meek, Check List Cret. and Jur. Foss., p. 31; Geol. N. J., Newark, 



1868, p. 730. 

 ? Piestochilus Slackii Gabb : Proc. Acad. Nat. Sci., Phila., 1876, p. 283. 

 ? Valuta sp ? Conrad : Am. Jour. Conch., vol. 5, p. 45, PI. i. Fig. 30. 



Shell, as shown by internal casts, slender, fusiform, nearly of equal 

 length above and below the point of greatest diameter of the body whorl ; 

 spire slender, apical angle about 35° to 40°; volutions five or six (none 

 of the specimens are perfect to the apex); angular in the middle and 

 slightly convex above and below, the last one increasing more rapidly 

 than those above; sutures distinct and deep; anterior end prolonged 

 into a straight, moderately slender canal; columella strong, marked by a 

 single oblique, well defined ridge or fold at about the middle or above the 

 middle of its length; aperture pyriform, largest above and angular at the 

 middle of the outer lip corresponding to the angulation of the body whorl; 

 volutions marked by distant, angular, vertical folds or ridges, seven to nine 

 of which may be counted on a single volution; these folds are indicated 

 very strongly on the center of the volution in the cast, but not visible to 

 any great extent much above or below; no positive indications of spiral 

 lines have been seen on any of the casts. 



Formation and locality: In the blackish layers of the Lower Green 

 Marls at Crosswicks Creek, N. J. In the collection at Rutgers College. 



Odontofusus typicus, n. sp. 

 Plate VI, Figs. 1-5. 



Shell when of full size about 2 inches long in the extreme, so far as 

 yet known; spire elevated, forming about one-half of the entire length 

 of the shell, which contains about four and one-half to five volutions in 

 the condition of internal cast; volutions angular, rather strongly so in the 

 principal one, forming an angulated periphery which is crossed by ten 

 or twelve prominent, vertical ridges, which generally show as transverse 



