124 PALEONTOLOGY OF NEW JEKiSEV. 



(Jkepidula plana?. 



Crepidula plana Say: .lour. Aciid. Nat. Sei. Phila., 2d ser., vol. 2, p. 220; Tnomey 



•nnd Holmes, Pliocene Foss. S. Carolina, p. 3, PI. XXV, tij>-. 12; Jliunion.s, (Jeol. 



N. Carolina, 1858, p. 276, fig-. 195; Ileilprin, Proc. Acad. Nat. Sci. IMiila., 1887, 



p. 404. 

 Vrijpia plana? (Say) Conrad: Proc. Acad. Nat. Sci. Pliila., 1862, p. 569; Meek, Check 



List Miocene Foss., p. l(i. 



A single fragment of tliis species was detected among the sand from 

 the inside of a small specimen of Busijcon scalarupira, whicli had been 

 entirely crushed in })acking — so that the entire mass was pulverized. The 

 specimen of C. plana represents the rostral half of the shell, enough to show 

 the entire septum, and the form of the beak and exterior of the shell pre- 

 serves the straight, uncurved form peculiar t(t the specimens of this species, 

 and it had apparently taken up its abode on the inner face of the Busycon 

 in the manner so pre\'alent among the living representatives of the sj^ecies. 

 The shell was too poor for illustration. 



This, like the example of C. fornicata, belongs to the collection of the 

 National Museum, but the specimen was from the soft gray marly sands at 

 Shiloh, N. J. 



Genus TROCHITA Schumacher. 

 Teochita perarmata. 

 PI. XXII, figs. 15-19. 



Infundibulum perannatnm Conrad: Proc. Acad. Nat. Sci. Pliila., vol. 1, p. 31; Miocene 



Foss., p. 8(», PI. XIV, tig. (by error fig. 4 in text). 

 Trochita (Infundibvlum) perarmata Gonrnd: Proc. Acad. Nat. Sci. Pbila., 1862, j). 569. 

 Trochita perarmata (Con.) Meek: Check List, p. 15. 

 ? Trochita centralis Heilprin: Proc. Acad. Nat. Sci. Phila., 1887, pp. 399 and 404. 



"Trochiform; whorls convex, armed with numerous erect foliated spines. 



"Allied to T. trochiform is Lam., but is less variable in form and has 

 larger spines." (Conrad, Proc. Acad. Nat. Sci., vol. 1, p. 31.) 



In Conrad's Miocene Foss. he adds to the above characters, "Apex 

 prominent, acute, remote from tlu^ center." The only examples of this form 

 whicli I have ol)served from New. Jersey are casts and imprints in the brown 

 clays and imj)erfect upjier portions of thu sliells from tlie gray marls. The 



