92 PALEOHTOLOGY OF NEW JERSEY. 



I have not been enabled to see, as it is attached to marl which it might not 

 be safe to remove. 



Locality: The specimen, which is the type of the species, is from the 

 greenish-gray marls at Shiloh, N. J., and belongs in the cabinet of the 

 Academy of Natural Sciences at Philadelphia. 



Saxicava paralis. 



Plate xvi, fig. 6. 



Saxicava paralis Conrad: Am. Jour. Conch., vol. 2, p. 70, PL iv, fig. 6; Heilprin, Mio- 

 cene Moll. New Jersey, Proc. Acad. Nat. Sci. Phil., 1887, pp. 397 and 403. 

 Saxicava (f) paralis Heilprin: Tert. Geol. IT. S., p. 8. 



"Sub-oval, ventricose, equilateral, very thin in substance, end margins 

 nearly equally rounded, summit prominent, lines of growth minute." (Con- 

 rad, loc. cit.) 



Only a single very imperfect right valve of this species is known, that 

 from which the above description and the figure in the American Journal 

 of*Conchology was taken. The beak is absent, and a large part of the 

 posterior cardinal portion of the shell. The form of the shell is trans- 

 versely triangularly-ovate in outline, and nearly equilateral, the beak, 

 which has been prominent and almost inflated, being a very little nearer to 

 the anterior than to the posterior extremity of the valve. Cardinal margins 

 very slightly arcuate and sloping toward the extremities, which are nearly 

 equally rounded, the longest part of each being a little below the middle 

 of the height of the valve. Disc of the shell somewhat highly ventricose, 

 the anterior umbonal slope the most abrupt, Basal line broadly arched. 

 Surface marked by comparatively strong concentric lines of growth. The 

 interior of the valve is unkown, but just the central part of the hinge is 

 exposed, showing the features of Saxicava as far as they can be traced. It 

 is, however, very obscure on this part The general expression of the shell 

 is that of a large Sphserium, but what is seen of the hinge contradicts this 

 expression. 



Locality: From the greenish-gray marls of the Miocene at Shiloh, N.J. 

 The specimen is from the collection of the Academy of Natural Sciences at 

 Philadelphia. 



