124 PALEONTOLOGY OF NEW JEliSEY. 



Crepidula plana?. 



Crepidula plana Say: Jour. Acad. Nat. Sci. Phila., 2d ser., vol. 2, p. 226; Tuomey 

 and Holmes, Pliocene Foss. S. Carolina, p. 3, PI. xxv, fig. 12; Emmons, Geol. 

 N. Carolina, 1858, p. 276, fig. 195; Heilprin, Proc. Acad. Nat. Sci. Phila., 1887, 

 p. 404. 



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

 List Miocene Foss., p. 16. 



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

 the inside of a small specimen of Busycon scalarispira, which had been 

 entirely crashed in packing— 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 to the specimens of this species, 

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

 in the manner so prevalent among the living representatives of the species. 

 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. 



TROCHITA PERARMATA. . 



PI. xxii, figs. 15-19. 



Infundibulum perarmatum Conrad: Proc. Acad. .Nat. Sci. Phila., vol. 1, p. 31; Miocene 



Foss., p. 80, PI. xiv, fig. 6 (by error fig. 4 in text). 

 Trochita {Infundibulum) perarmata Conrad: Proc. Acad. Nat. Sci. Phila., 1862, p. 569. 

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

 f 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. trochiformis 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 the center." The only examples of this form 

 which I have observed from New Jersey are casts and imprints in the brown 

 clays and imperfect upper portions of the shells from the gray marls. The 



