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. Grabb'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 wiU readily help to distinguish the species, which I 

 judge to be somewhat rare. 



Fonnnfiou and locality: In the Lower Green Marls in Burlington County, 

 New Jersey, as stated by Mr. Gabb. Collection Acad. Nat. Sci., Phila. 



Pyripusus 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 



