GASTEROPODA OF THE LOWER GREEN MARLS. 73 
This is probably the largest Gasteropod of the Cretaceous formation 
within the State. It very closely resembles V. Conradi Gabb, but is much 
larger in its extreme. The volutions of the spire are proportionally much 
longer and by far less ventricose, and none of them are shouldered at the 
top as in that species. The beak is also less extended and stronger, while 
the vertical folds appear to have been more closely arranged. 
Formation and locality: In the Lower Green Marls at Cream Ridge, 
Holmdel, Freehold, Neversink, and Eastern Monmouth, New Jersey. Col- 
lection of Rutgers College. 
VOLUTOMORPHA GABBI, nh. Sp. 
Plate vil, Fig. 6, and Plate vit. Figs. 1-4. | 
Shell of moderate size, attaining a length of about 34 inches in the 
largest specimens observed. Form robust, with a short conical spire, in 
which may be counted about three volutions above the last one; body 
volution forming about three-fourths of. the entire length, ventricose above 
and tapering below, with a rather graceful swell near the middle of its 
length, and rather abruptly narrowed above to the suture, forming an angu- 
lation at the top; surface marked by coarse, moderately distinct, vertical 
folds, which are strongest near the angulation at the top of the volution, 
and become faint or even obsolete near the lower end; also by more closely 
arranged spiral lines which present a somewhat nodose appearance at their 
junctions with the vertical folds. The columella, as shown on an internal 
cast, has been very thick and strong, and provided with a single strong 
oblique fold near the middle of its length. Aperture rather wide and more 
than half as long as the shell. 
This species has many features in common with V. Conradi Gabb, but 
is proportionally shorter and more robust, with a shorter spire and more 
distant vertical folds, while the body volution is much larger above in pro- 
portion to its length and very much more angular. 
Formation and locality: In the Lower Marls at Holmdel, New Jersey, 
where the external features are preserved in the marls, and as internal casts 
in a coarse, pebbly sand marl, quite ferruginous in character, at Mullica, 
New Jersey. The latter specimen is in the cabinet of the Acad. Nat. Sei, 
Phila., and the former at Rutgers College. 
