36 PALEONTOLOGY OF NEW JERSEY. 
as P. perlata. Perhaps if larger individuals of that form were examined 
the volutions might show a much greater angulation than does his figure 
cited above, and also,-if the shell of this one were obtained, the anterior 
canal might be found prolonged as it is in the southern shell; but in their 
present condition I should think them more probably distinct. 
Formation and locality: Lower Green Marls in Burlington County, 
New Jersey. Collection Acad. Nat. Sci., Phila. 
PYROPSIS OCTOLIRATA. 
Plate 11, Figs. 8-10. 
Ficus octoliratus Conrad: Jour. Acad. Nat. Sci., Phila., 2d ser., vol. 3, p. 332; 
Pl. xxxv, Fig. 6; Gabb, Jour. Acad. Nat. Sci., Phila., 2d ser., vol. 4, p. 27.6 
Perissolax octolirata (Con.) Gabb: Synopsis, p..67; Meek, Check List Cret. and 
Jur. Foss., p. 23; Geol. N. J., Newark, 1868, p. 730. 
Shell of small size, globular or subpyriform in general outline; com- 
posed of about three very ventricose volutions; spire low-conical, apex 
apparently not mammillated; volutions marked by from six to nine spiral 
ridges or costz, which are usually strongly marked on the casts and are 
crossed by vertical ridges at about an equal distance or slightly more dis- 
tant than the spiral lines, and which divide the surface into a number of 
square depressed spaces; rostrum short and pointed, apparently straight, 
and, as seen from the aperture side, about half as long as the diameter of 
the last volution; aperture elongate, pointed at each extremity, and scarcely 
more than half as wide as long. In the casts the suture line is distinct and 
often very. strongly marked. 
The New Jersey specimens of this species differ from Mr. Conrad's 
figure of the type, which was a Tippah County, Mississippi, specimen, in 
being marked by vertical lines, which that specimen does not show nor 
does Mr. Conrad mention them as occurring, unless it may be inferred that 
his statement that the coste are “inclined to be square” may have meant 
this, which, however, I infer to have applied to spaces between the ridges 
being flat instead of being concave as in those from New J ersey. This 
feature (the vertical coste) is a very marked one on these specimens, and 
I am strongly inclined to consider it a specific distinction, as on a single 
