GASTEKOPUDA OP THE EOCENE MARLS. 201 



of the principal volutions. Surface of the shell marked by numerous raised 

 spiral lines, separated by slightly broader interspaces. Length of the shell 

 about one and a quarter inches. 



It is somewhat difficult to say to which of several genera this shell 

 properly belongs. It might be classed with Tritonidea Swainson, except that 

 the folds are equal and the beak too slender. Its close general resemblance 

 to the common Oyster drill, Urosalpinx cenereus Say is so great that one 

 would naturally be inclined to associate it with that one. It is, however, 

 somewhat larger and the volutions more rounded or inflated between the 

 suture lines, but these are the only observable differences between this cast 

 and the recent shells of that species. The cast of the beak and anterior por- 

 tion of the shell is very slightly imperfect and prevents a positive determi- 

 nation of its relationship. , 



Formation and locality : In the upper layer of the Upper Green Marls, 

 at Shark River, New Jersey. Collection at Rutgers College. 



Genus CLAVELLA Swainson. 



Clavella raphanoides ? . 



Plate XXVI, Figs. 7, 8. 



Fusus raphanoides Conrad: Jour. Acad. Nat. Sci., Phlla., vol. 7, 1st ser., p. 144. 

 Clavella raphanoides Conrad: Am. Jour, of Conch., vol. 1, p. 18; Meek, Check List 

 Eocene Foss., p. 19. 



A single imperfect cast of a species of Clavella, resembling G. rapha- 

 noides Conrad, occurs in the collection, but is too imperfect to afford positive 

 means of specific identification. The spire is rather higher than that of 

 the Claiborne shell, but so little that the difference between conditions of 

 preservation might easily account for it. The most pronounced feature of 

 the cast is the very strong and broad anterior beak, being so much stronger 

 than would be the case with an ordinary species of Fusus or Fasciolaria that 

 it is thereby readily distinguished by this feature. The spire is high and 

 the volutions strong, and the cast presents no evidence of vertical folds, or 

 scarcely of spiral strise. The anterior beak is preserved in the matrix for 

 perhaps more than half of its original length, and is still more than three- 



