216 tALEOlfTOLO&Y OF iJEW JERSEY. 



shell marked, especially on the body volution, by regular, even, flattened, 

 longitudinal or vertical costse, which are formed by the fasciculation of the 

 growth lines and which are scarcely recurved on the sulcus below the suture, 

 but are carried forward in a broad sweeping curve across the body of the 

 principal volution, nearly to the slender beak, before they are again bent 

 backward. 



This shell is more slender than P. altispira herein described, and has 

 a longer anterior beak. The volutions differ very materially in form and 

 also in proportion. On a gutta-percha cast made in a natural mold of one 

 specimen showing the exterior features the upper volutions appear to have 

 possessed stronger vertical folds; but the feature is problematical, and may 

 be the result of accident. 



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

 at Shark River, New Jersey. From the collections of the Am. Mus. Nat. 

 Hist, and Rutgers College, New Jersey. 



Pleurotoma (Surcula ?) altispira, n. sp. 

 Plate XXXIII, Figs. 10-13. 



Shell much elongated, spire much more than one-half the length of the 

 shell, very much elevated, consisting of six or more volutions in the cast. 

 Volutions moderately couA^ex, not angulated, but in the cast marked by a 

 rather broad elevated band at the base of each, except, perhaps, the outer 

 or dorsal portion of the last one. Body volution and beak forming fully 

 half the entire length. Aperture only moderately large, pointed below and 

 rounded on the outer side. Columella slender and pointed at the base. 

 Beak short. Sui'face of the shell, so far as can be ascertained, marked only 

 by fine lines of growth, which are strongly curved forward in crossing the 

 body volution, being returned again, gently, after passing the largest part. 



This species differs in the form of the volution from any other form in 

 the New Jersey beds. It corresponds in shape with P. elahorata Conrad 

 from the Claiborne sands, but is three times the bulk of the largest specimen 

 of that species yet observed in tlie many collections which I -have seen from 

 that locality. 



Formation and locality: In the upper layers of the Upper Grreen Marls, 

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



