124 PALEONTOLOGY Of NEW JERSEY. 
CREPIDULA PLANA?. 
Crepidula plana Say: Jour. Acad. Nat. Sei. Phila., 2d ser., vol. 2, p. 226; Tuomey 
and Holmes, Pliocene Foss. 8. Carolina, p. 3, Pl. 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: Proe. 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 crushed 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. 
Pl. xx, figs. 15-19. 
Infundibulum perarmatum Conrad: Proce. Acad. Nat. Sci. Phila., vol. 1, p.31; Miocene 
Foss., p. 80, Pl. xtv, fig. 6 (by error fig. 4 in text). 
Trochita (Infundibulum) perarmata Conrad: Proce. Acad. Nat. Sci. Phila., 1862, p. 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. 
s 
“Allied to 7. trochiformis Lam., but is less variable in form and has 
larger spines.” (Conrad, Proe. Acad. Nat. Sei., 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 eray marls. ‘The 
