62 PALEONTOLOGY OF NEW JERSEY. 
FUSID&. 
Genus FUSUS Lam. 
Fusus ? HOLMDELENSIS, n. sp. 
Plate vi, Figs. 10, 11. 
Shell of moderate size, about 14 inches in length; spire short, less than 
one-third as long as the body volution and beak; volutions four or more, 
the upper ones rather small and the body volution proportionally large, 
ventricose in the middle and extended in front in a moderately long, slightly 
twisted canal; aperture large, more than half the entire length of the shell; 
the outer lip broadly and strongly sinuate in the upper part and somewhat 
extended forward below; columella slender, twisted; surface of the volu- 
tions marked by rather strong, prominent, vertical folds, which are most 
distinct on the body of the lower whorl, but become obsolete below, and 
on the upper whorls are extended from suture to suture, ten of these folds 
being visible on the large volution; strong lines of growth also cross the 
shell parallel to the border of the aperture; closely arranged, elevated spiral 
lines cover the entire shell, and are finest and most numerous on the upper 
part, more distant below the middle, and strongly marked on the anterior 
beak, where they are very oblique; the spaces between the lines apparently 
flat. 
This species is apparently a true Fusus, and is the only one I have 
noticed in the Cretaceous green sands of the State. In the condition of an 
internal cast it would present somewhat the appearance of a specimen of 
Volutomorpha bella, but would have a rather shorter spire and ventricose 
volutions, and might be somewhat difficult to distinguish, but on the speci- 
men figured, on which the shell substance is largely preserved, there is no 
evidence of columella plications, which I think would be readily distin- 
guished had they existed. The surface markings are also different. I 
know of no other shell in the formation with which it would be readily 
confounded. 
Formation and locality: In the coarse, green marls of the Lower Green 
Sands at Holmdel, New Jersey. In the collection of Prof. Reiley. 
