MIOCENE MOLLUSCA AND CRUSTACEA. 89 
The species is a very close neighbor to C. contracta Say, now common 
on our coast, but is much smaller. When compared with small specimens 
of that shell it is seen to be much heavier, also shorter, with a larger 
beak, but differs principally in the surface markings; the concentric ridges 
being two to three times as heavy as on any dwarfed or young specimen, 
of corresponding size, which I have seen among those examined from many 
localities. The small variety from Beaufort, N. C., approaches it most nearly. 
They also show radii in the young state, which this does not possess. 
Locality: The specimens are from near Shiloh, N. J., from the greenish 
gray marls, and belong to the National Museum collections. 
Family SAXICAVID. 
Genus PANOPA\A Menard, 
PANOP#A GOLDFUSSI. 
Pl. xVI, figs. 9-13. 
Panopea Goldfussti Wagner: Jour. Acad. Nat. Sci. Phila., Ist ser., vol. 8, p. 52, Pl. 1, 
fig. 3. 
Panopea Goldfussii (Wag.) Meek: Check List Miocene Foss., p. 12. 
The following is Wagner’s description of this species: “Shell oblong, 
subovate, ventricose, disks with concentric, unequal, shallow grooves; lines 
of growth coarse and prominent; anterior extremity slightly gaping; anterior 
margin rounded, anterior dorsal margin elevated; posterior side narrowed, 
somewhat produced, not reflected; posterior dorsal margin nearly rectilinear; 
cardinal teeth obliquely compressed, united at the base by the nymph, short 
and not very prominent.” 
“Allied to Panopea reflera Say, from which it differs in being propor- 
tionally more elongated, and without reflected margin, in being nearly 
closed anteriorly, and in having a straight dorsal line.” 
Mr. Wagner's specimens of this species were from the Meherrin River 
in North Carolina, but judging from his figures I do not think there can be 
any specific distinction between them and the New Jersey shells, although 
there is some slight difference in the proportional dimensions of the parts. 
In the New Jersey specimens the posterior extremity is proportionally 
