Xetc Species of Fussih front Ohiu. 225 



aii\", and in the more regular tapering spire, — those mostly hav- 

 ing the bocly-Yolntions proportionally enlarged. 



Formation and Locality. — In the Maxville limestone (Chester 

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

 E. B. iVndrews. 



Polypliemopsis melaiioides, u. sp. 



Pal. 0., Vol. Ill, Plate 10, Fig. 18. 

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

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

 vated, pointed at the apex, the apical angle being about thirty-five degrees 

 ^vhen uncompressed. The specimen figured gives on measurement thirty 

 degrees in the line of compression, and forty degrees in the opposite direc- 

 tion. Volutions about five and a half, gradually increasing in size, mode- 

 rately and evenly convex, with distinct sutures. Aperture elongate ovate, 

 widest across the middle, rounded and effuse below and pointed above. . 

 Columella not observed. Surface apparently smooth. 



The species is nearly of the form of M. fusiforme, Hall (Geol. 

 Eept. Iowa, Vol. I, Part 2), from the Coal Measures of Iowa, 

 but is considerably more slender. It is possible it may not pro- 

 perly 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 ^laxville limestone, at ISTew- 

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



Belleropbon alteriiodosu§, n. sp. 



Pal. O., Vol. Ill, Plate 10, Figs. 17—19. 



Shell of about a medium size, and somewhat subglobose in general form, 

 with an appearance of being slightly flattened on the dorsum in immature 

 specimens ; while on the adult forms, the dorsum is marked on the outer 

 half of the body-volution hj a double series of rounded nodes, those on one 

 side of the centre alternating with those of the other side, and the inner 

 margins of the two series interlocking with each other. Aperture broadlj^ 

 elliptical, strongly modified by the projection of the preceding volution, on 

 the inner margin. Auriculat' jns largely developed and slightly reflected. 

 Axis very distinctly perforate. Inner lip somewhat callous on the pro- 

 truding inner volution. Surface of the shell, so far as can be ascertained, 

 marked only by lines of growth, beyond the nodes mentioned. 



The species is somewhat similar in general form to B. Mont- 

 fortianus, N. and P., from the Coal Measures, in its general 

 form, but does not possess the strong transverse folds nor the 



