MIOCENE MOLLUSCA AND CRUSTACEA. 121 
Somewhat resembles LZ. heros Say, but has a more vertical axis, with 
rounder, more exsert inner volutions, giving a proportionally higher spire. 
The specimens figured as Natica heros Say, by Tuomey and Holmes, Pliocene 
Foss. South Carolina, Pl. xxx, fig. 15, I consider as also pertaining to 
this species, although being very much larger than the New Jersey exam- 
ples from which this description is taken. 
Formation and locality: In the gray micaceous marls of the Miocene at 
Jericho, N. J. In the collections of the National Museum. 
Genus NEVERITA Risso. 
NEVERITA DUPLICATA. 
Pl. xxt, figs. 135-16. 
Natica duplicata Say: Jour. Acad. Nat. Sci., Phiia., vol. 2, lst ser., p. 247; Tuomey 
and Holmes, Plioc. Foss. S. C., p. 114, Pl. xxv, fig. 16; Emmons, Geol. N. C., 
1852, p. 266, fig. 150. 
Neverita duplicata Conrad: Proc. Acad. Nat. Sci., Phila., 1862, p. 564; Meek, Cheek 
List Miocene Foss., p. 19. 
“Shell thick, subglobose, cinereous, with a black line revolving on the 
spire above the suture, and becoming gradually diluted, dilated, and obsolete 
in its course; within brownish livid; a large incrassated callus of the same 
color extends beyond the columella, and nearly covers the umbilicus from 
above; wnbilicus with a profound sulcus or duplication.” (Say.) 
There are a number of small individuals in the collections made within 
the State that are unmistakably of this species, although none of them exceed 
five-eighths of an inch in diameter, and all are more or less imperfect from 
breakage or the removal of the surface. They are quite readily recognizable 
as identical with the form now common on the Atlantic coast, and can not be 
said to differ in any respect. One feature of many of them, common, how- 
ever, to other associated species, is, that from weathering and decay the 
callous portion bordering the suture breaks away, leaving the spire more 
exsert than in the entire form, and alse presenting a flattened rim on top of 
each volution bordering the suture, thus giving them the same structure 
along the suture so commonly seen on the Cretaceous genus Gyrodes. It 
is plainly seen, however, to be only the effect of decay in these shells, as it 
