120 PALEONTOLOGY OF NEW JERSEY. 
Wood, for the fossil forms usually considered as L. heros. In this he has 
been followed by F. B. Meek and Prof. Heilprin with a question. In com- 
paring the New Jersey forms with the figures given of that English species, 
by its author, I find a much greater difference than exists between these 
fossil shells and the living specimens of L. heros. Therefore I am the more 
inclined to differ from Conrad’s decision and to consider these as the fossil 
representatives of the common species of our own coast. Mr. Conrad. also 
cites Natica heros, given by Messrs. Tuomey and Holmes in their Plio- 
cene Foss. of South Carolina, as identical with ZL. catenoides, Wood. In 
this I also think him quite in error; as Tuomey and Holmes’s figure repre- 
sents a very much more upright or vertical shell, with an open umbilicus 
and rounded conspicuous volutions up to the apex of the spire. Although 
LL. heros often possesses very ventricose volutions, those of the spire are 
much more subdued and more deeply inserted than those of the South Car- 
olina shell. From New Jersey I have two small individuals, having exactly 
the characters shown in Tuomey and Holmes’s figure, and consider it as an 
entirely distinct species, and it is herein described as such. 
Formation and locality: The specimens representing ZL. heros are from 
near Shiloh and Jericho, N. J., and belong to the collection of the National 
Museum and that at New Brunswick, N. J. 
NATIcCA (LUNATIA) TUOMEYI, n. sp. 
Pl. xxu, figs. 6-8. 
Natica heros Tuomey and Holmes: Plioc. Foss. S. Carolina, p. 114, Pl. xxv, fig. 15; 
not V. heros of Say and others. 
Shell small to medium size, very ventricose or subglobose, with full 
rounded volutions and deep distinct sutures; spire moderately elevated and 
the entire shell upright and vertical in its axis. Aperture large, semicircular 
or subovate, oblique, rounded below and rather pointed above; inner lip 
coating the inner volution for the upper two-fifths of the extent, leaving an 
open umbilicus below, which is clear and deep. Surface of the shell pol- 
ished when perfect, but marked with fine lines of growth parallel to the 
margin of the lip; and also under a magnifier showing faint spiral lines. 
