64 PALEONTOLOGY OF NEW JERSEY. 
The shell is quite variable in its general outline, being sometimes much 
longer than high, in which case the prolongation is mostly anteriorly, 
making the hinge line appear proportionally short, and throwing the beak 
farther back. 
Locality: All the specimens which I have seen are from Jericho, N. J., 
and are from the National Museum collection. 
LUCINA TRISULCATA. 
Plate x, figs. 1-4. 
Lueina trisulcata Conrad: Am. Jour. Sci., vol. 41, Ist ser., p. 346; Miocene Foss., p. 
71, Pl. xt, fig. 5; Proc. Acad, Nat. Sci. Phil., 1862, p. 577; Meek, Check List 
Miocene Foss., p.8; Heilprin, Proc. Acad. N. Sci. Phil., 1887, pp. 400 and 403. 
“Obovate, convex; with concentric lines, and two or three distinct 
concentric furrows; lunule profound. Differs from L. alveata of the lower 
Tertiary in being less ventricose, and in the much more profoundly impressed 
lunule; the cardinal teeth are also very different.” (Conrad in Journal 
of the Academy of Natural Sciences of Philadelphia.) 
In the Miocene Fossils Mr. Conrad gives the following description: 
“Ovate, convex, elevated, with two or three remote concentric furrows and 
numerous concentric lines; anterior side rather longer than the posterior; 
posterior margin subtruncated; beaks prominent; lunule cordate and very 
profound; inner margin crenulated; cardinal and lateral teeth distinct.” 
The only specimens which I have seen from New Jersey are two 
valves from the well-boring at Atlantie City, which, while differing very 
materially from the figure given by Mr. Conrad, and, in some of their feat- 
ures, from the descriptions, still possess characters that ally them specifically 
with those from more southern localities. One of the principal differences 
that I find is in the less convexity of these New Jersey specimens, which 
are quite flat as compared with specimens from the Neuse River in North 
Carolina. They are also more coarsely marked concentrically, the lines 
being thicker and more recurved, while one of them is entirely destitute of 
any indication of the deep concentric furrows. The shells are also thinner 
on the hinge, and the teeth much less pronounced; while the lunule in both 
examples is very small and quite the opposite from ‘very profound,” as 
