GASTERJPODA OF THE EOCENE MARLS. 197 
slender, no indications of markings of any kind are seen on the cast. Upper 
volutions marked by strong vertical folds on the periphery, with broad, 
shallow, rounded interspaces. Nine of the folds can be counted in the space 
of one volution. The body volution, both on the cast and in the matrix, 
is entirely destitute of all remains of these folds. Surface of the shell 
marked by strong, raised, rounded spiral lines, which are obsolete on the 
body whorl, while the transverse lines of growth remain faintly visible. 
The only respectably well preserved cast and partial matrix of this 
species has been subject to some distortion by compression, and is also 
slightly coated with a deposit of iron, so as to obscure the finer markings; 
but the form of the shell has been so entirely distinct from any other in the 
Eocene formation that there is but little chance of confounding it. ‘There 
may be some slight doubt as to the correct reference of the shell to the 
genus Fusus, but there is no evidence present of features pertaining to any 
other. 
Formation and locality: In the upper layers of the Upper Green Marls, 
at Shark River, New Jersey. Collection at Rutgers-College. 
Fusus (NEPTUNEA ?) STAMINEA. 
Plate xxv, Figs. 1, 2. 
Fusus stamineus Conrad: Foss.. Shells of the Tert., p. 43; Am. Jour. Conch., vol. 
I, p. 14. 
A single cast of small size, possessing all the essential features of the 
above species is found among the collections. It is pyriform m general 
outline, with a depressed conical spire, having three and a half whorls, 
which are slightly exsert, distinctly angular on the periphery and moderately 
convex below the angulation. The periphery is marked by from nine to 
twelve transverse nodes, only slightly indicated by the undulation of the 
surface, either above or below the angulation, but are quite strong on the 
edge with concave interspaces. The aperture is transverse, angular in the 
middle, and terminates below in a slender canal, the beak being very slen- 
der and nearly as long in the cast as the height of the shell above it, and 
is still imperfect at the end. The surface of the cast is marked by com- 
paratively strong, spiral strie, which are arranged in groups on the lower 
