GASTBE'JPODA OP 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. 

 1, 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 in 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 striae, which are arranged in grouj)s on the lower 



