GASTEROPODA OP THE EOCENE MARLS. 219 



sutures distinctly marked and limited above by a narrow ridge; volutions 

 below the angle almost obconical, regularly tapering to near the end of the 

 short, rather obtuse beak ; aperture narrow, widest at the angle of the body 

 whorl and almost gradually narrowing below, the outer lip thin and extended 

 in the middle, as shown by the growth lines, forming a broad rounded 

 extension; columella smooth; sinus in the outer lip situated above the 

 angle of the volution, very shallow, and extending from that point to the 

 suture, occupying the entire upper surface of the volution; surface of the 

 shell marked by fine spiral strige both above and below the angle of the 

 volution, becoming slightly coarser and somewhat alternate below the 

 middle of the whorl and on the beak; transverse striae of growth also 

 marks the surface, and are sometimes grouped on the angle of the volution 

 so as to produce slight undulations or incipient nodes. 



Formation and locality: In the upper or Eocene layers of the Upper 

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



SURCULITES CADAVEROSUS, n. Sp. 



Plate XXXIII, Figs. 15, 16. 



Shell elongated, slender, and fusiform; spire elevated, as long as the 

 shell below the angle of the principal volution; whorls probably six or more, 

 very angular in the upper part, the upper surface flattened between the 

 angle and the suture, and sloping but little, but never horizontal^ below 

 the angle they rapidly decrease in size downward, are but very slightly 

 convex and extended in front, forming a rather long, slender, pointed ante- 

 rior beak; aperture narrow and elongated, the sinus in the lip scarcely 

 marked, and the margin of the lip extended forward below the angle; sur- 

 face of the cast marked by proportionally coarse spiral striae of nearly 

 equal size above and below the angle; also by obscure transverse lines of 

 growth. 



This species differs from S. annosa in its more slender and gaunt look- 

 ing form, the volutions looking angular and uncouth in their proportions from 

 their great contractions between the angle and the suture below, arising 

 from the great proportional exposed length of each volution. It also differs 



