592 Contributions to Invertebrate Palaeontology. 



This species is rather closely related to several forms which have 

 been described from the Coal Measures of the Western States, but 

 differs in the form of the volutions somewhat from any, and in the 

 more regular tapering- spire, — those mostly having the body-volu- 

 tions proportionally enlarged. 



Formation and Locality. — In the Maxville limestone (Chester 

 and St. Louis groups), at Newtonville, Ohio. Collected by Prof. 

 E. B. Andrews. 



Genus POLYPHEMOPSIS Portlock. 



Polyplieniopsis iiielaiioides. 



Plate XIV, fig. 13. 



Polijphemopsis melanoides Whitf., Ann. N. Y. Acad. Sci., 1882, p. 225. 



Shell rather helow a medium size, elongate-fusiform ; the length nearly 

 twice and a half the greatest diameter, when not compressed ; spire elevated, 

 pointed at the apex, the apical angle heing about thirty-five degrees when 

 uncompressed. The specimen figured gives on measurement thirty degrees in 

 the line of compression, and forty degrees in the opposite direction. Volutions 

 about five and a half, gradually increasing in size, moderately and evenly 

 convex, with distinct sutures. Aperture elongate ovate, widest across the 

 middle, rounded and eflfuae below and pointed above. Columella not observed. 

 Surface apparently smooth. 



The species is nearly of the form of M. fasiforme Hall (Geo!. 

 Rept. Iowa, vol. i, part 2), from the Coal Measures of Iowa, but 

 is considerably more slender. It is possible it may not properly 

 belong to the genus, as the columella has not been closely observed ; 

 but so far as can be determined, it appears to be twisted. 



Formation and Locality. — In the Maxville limestone, at New- 

 tonville, Ohio. Collected by Prof. E. B. Andrews. 



IlETEROPODA. 

 Genus BELI.EKOPIIOX Montfort. 



Belleroplion siiliIacTis? 



Plate XIV, figs. 20 and 21. 



? Dfllerophon suhldvi.'i Hall, Trans. Albany Institute, vol. iv, p. 32. 



Shell of a medium size or smaller, subglobose in general form, with a 

 moderately expanded lip around the sides of the aperture. Umbilicus closed, 

 the axis being solid and the auriculations thickened at their junction with the 

 body of the shell, covering the central or axial portion. Volutions round and 



