GASTEROPUDA OF THE EOCENE MARLS. 2()] 
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., Phila., vol. 7, Ist 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 C. 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 striae. The anterior beak is preserved in the matrix for 
perhaps more than half of its original length, and is still more than three- 
