GASTEROPODA OF THE LOWER GREEN MARIS. 57 
elongated, pointed above and below, not exceeding one-half the length of the 
entire shell; extension of the beak unknown, but apparently short; surface 
of the volutions marked on the cast by remains of closely arranged, not 
very strong, flexuose, vertical lines or folds, which have been directed 
strongly forward. in crossing the volution from above, and become obsolete 
before reaching the middle of the volution on the cast, not visible in any 
degree on the body whorl; the body volution also preserving distinct evi- 
dences of moderately strong, revolving lines, which on the specimens used 
for description are a little more than a sixteenth of an inch distant on the 
central portions, where they are parallel to the suture line above, while 
those below the middle diverge more rapidly and are more oblique. . 
This shell is so entirely distinct from any other noticed from the New 
Jersey beds that there is scarcely a possibility of mistaking it. It differs 
also in proportions and form from any of those described by Meek and 
Hayden from the upper Missouri region so decidedly as not to be readily 
confounded with them. There are remains of a very closely allied form 
from Alabama, but, so far as [am aware, it is undescribed. There is less 
angularity of the volutions than is common among the representatives of this 
section of the group already described, and it apparently had a shorter 
beak than is common among them. — Still, [ see no reason for considering it 
as generically distinct from the group Neptunella as defined by Mr. Meek, 
so far as can be determined from the internal casts only, unless it be in the 
length of the spire being fully as great as that of the aperture, which I can 
hardly think ought to be a generic feature, although Mr. Meek gives it so 
in his generic diagnosis. | 
Formation and locality: From the ferruginous layers of the lower Mar!s, 
at Mullica Hill, New Jersey. One of the specimens is from the collection of 
the Acad. Nat. Sci., Phila., and the other from that at Rutgers College. 
