54 PALEONTOLOGY OF NEW JERSEY. 
adelphia, and from which the figures on our plate are taken, with as much 
care as possible. The specimen is turbinate, with a very low spire, and 
consists of little more than three volutions, which increase in size very rap- 
idly with the increased growth of the shell; the last one comprising by far 
the greater bulk of the specimen. In section this volution is strongly ovate, 
being modified, however, somewhat on the inner side by the previous volu- 
tion. The aperture is very large, widest at the upper third of its height 
and sharply pointed at the base. The columellar cavity of the cast, which 
the specimen is to a great extent, is proportionally large and indicates a 
rapidly widening umbilical cavity. The impression bears no evidence of 
any ridge or similar feature on its surface. The body volution is marked 
by rather obscure indications of vertical folds on its upper part, of which 
seven may be counted on the outer half of the volution. The fragment of 
shell which remains on the specimen is marked by rather strong, somewhat 
irregular lines of growth, which are gathered in groups on the upper por- 
tion of the volution to form the vertical folds before mentioned. 
Mr. Gabb’s description of the species is as follows: “Shell pyriform, 
whorls three, spire low, surface marked by longitudinal ribs or undulations, 
about twelve on the body whorl, crossed toward the beak by fine revolv- 
ing lines.” This latter feature of fine lines toward the beak I could not 
distinguish, the shell being in an extremely unfavorable state of preserva- 
tion, a part of which may have resulted since the description was originally 
drawn. The figures will readily help to distinguish the species, which I 
judge to be somewhat rare. 
Formation and locality: In the Lower Green Marls in Burlington County, 
New Jersey, as stated by Mr. Gabb. Collection Acad. Nat. Sci., Phila. 
PYRIFUSUS TURRITUS, n. Sp. 
Plate v, Figs. 1-5. 
Shell below a medium size for the genus, with a spire rather more than 
usually elevated, the volutions of which have been about five in number, 
very distinctly pronounced and angular in the middle, the suture lines well 
marked and angular; apical angle 45° to 50°; body volution strongly an- 
gular, shorter above than below the point of greatest diameter, and forming 
