66 PALEONTOLOGY OF NEW JERSEY. 
ODONTOFUSUS SLACKI. 
Plate vi, Figs. 8, 9. 
Fasciolaria Slackit Gabb: Proce. Acad. Nat. Sci., Phila., 1861, p. 322; 1876, p. 
282; Meek, Check List Cret. and Jur. Foss., p. 21; Geol. N. J., Newark, 
1868, p. 730. 
? Piestochilus Slackti Gabb: Proc. Acad. Nat. Sci., Phila., 1876, p. 282. 
? Voluta sp 2 Conrad: Am. Jour. Conch., vol. 5, p. 45, Pl. 1, Fig. 20. 
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 
5 5 \ 
or twelve prominent, vertical ridges, which generally show as transverse 
