110 PALEONTOLOGY OF NEW JERSEY. 
individuals rather less; volutions convex, four or five in number, only four 
in the casts; sutures deeply marked, indicating a comparatively thick shell; 
body volution large, half as long as the entire length of the cast, or some- 
times three-fifths of the entire length; base of the body volution extended 
in front; aperture equaling one-half the length of the cast; elongate ellip- 
tical in outline, acute at the upper angle and the margin extending above 
the line of the suture where the lip has extended upon the preceding volu- 
tion; lower margin of the aperture prolonged and narrow; outer margin 
more convex than the inner; columellar cavity rather large, indicating a 
strong and thickened columella, which has been smooth and without any 
indications of folds or markings; surface of the volutions marked by dis- 
tant but not very strong vertical folds, which are only seen on the internal 
cast upon careful examination; surface of the shell and features of the lip 
and posterior canal unknown. 
The casts of this species, although somewhat common at this one 
locality, are not very readily distinguished from casts of Volutomorpha Kanet 
Gabb, with which they occur, and the only reliable features by which they 
‘an be distinguished is the total absence of columellar folds or plications 
and the extension of the aperture upon the preceding volution when the 
outline of the margin is preserved, which is not uncommon. In size, gen- 
eral form, and proportions they are very similar, this one being rather more 
ventricose on the body volution, especially in the upper half of its length. 
Formation and locality: In the dark green layers of the lower Green 
Marls at Crosswicks Creek, New Jersey. Collections at Rutgers College. 
Collected by Dr. N. L. Britton, 
ROSTELLARIA FUSIFORMIS, 0. sp. 
Plate xin, Figs. 14, 15. 
Shell small, slender, and fusiform; spire elevated and slender, the apical 
angle being about 20° or 25°; volutions slender, slightly convex on their 
exposed surfaces; four only preserved in the cast, but there have been four 
or five more above, making eight or more in all; body volution greatly 
prolonged in front, forming a long slender beak with a proportionally strong 
