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 octolieata. 

 Plate II, Figs. 8-10. 



Ficus odoliratus Conrad: Jour. Acad. Nat. Sci., Phila., 2d ser., vol. 3, p. 333; 



PI. xxxv, Fig. 6 ; Gabb, Jour. Acad. Nat. Sci., Phila., 2d ser., vol. 4, p. 27.6 

 Perissolax odolirata (Con.) Gabb: Synopsis, p. G7; 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 costse, 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 tban 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 costse 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 Jersey. This 

 feature (the vertical costse) is a very marked one on these specimens, and 

 I am strongly inclined to consider it a specific distinction, as on a single 



