86 PALEONTOLOGY OF NEW JERSEY. 
the specimen showing the interior both extremities would appear to have 
been slightly gaping, but not widely so; the anterior end is broadly and 
obliquely truncated, the truncation extending for nearly two-thirds of the 
height from the dorsal line, and the gape has been throughout this distance. 
Below the truncation the anterior end is sharply rounded and the base and 
posterior end unite into one broad, nearly regular, curve. Surface of the 
shell marked by fine concentric lines of growth and stronger undulations 
of the surface. In the interior the spoon-shaped process of the hinge is 
proportionally large and very thick, and the posterior ridge strong and well 
marked, although the muscular markings are not traceable. 
It is entirely impossible to say if this is truly a Peripioma or if it should 
be classed with Anatina, as Prof. Heilprin has done. It appears to me, 
however, that by its form it would come as near the one as the other, and 
the right to either name will rest entirely on the equality or inequality of 
the valves, and the apparent gaping of the shell at its extremities. 
Locality: It has only been found at Shiloh, N. J. Mr. Conrad says it 
is an abundant species; although among two quite large collections from 
that place, it is entirely unrepresented; the specimens borrowed from the 
Academy of Natural Sciences are the only ones I have seen. 
Family CORBULID2. 
Genus CORBULA Brug. 
CORBULA ELEVATA. 
Pl. xv, figs. 15-19. 
Corbula elevata Conrad: Miocene Foss., p. 7, Pl. Iv, fig. 3; Catalogue in Proc. Acad. 
Nat. Sci. Phil. 1862, p. 572; Meek, Check List Miocene Foss., p. 12; Heilprin, 
Tert. Geol. U.S., p. 8; Miocene Moll. New Jersey, Proc. Acad. Nat. Sei. Phil. 
1887, pp. 397, 401, 403. 
Corbula levata (Con.) Meek: Miocene List, Geol. New Jersey, 1863, p. 297 (typograph- 
ical error). 
“Shell triangular, equilateral, height greater than the length, inferior 
valve ventricose, with regular numerous concentric impressed lines, which 
disappear on the posterior slope; umbo profoundly elevated; posterior 
slope with an obtuse furrow descending from the beak; extremity narrowed, 
slightly emarginate.” (Conrad in Miocene Fossils, p. 7.) 
