94 
AUG. F. FOERSTE 
F. THE GASTEROPODA OF THE BRASSFIELD LIMESTONE OF OHIO 
The following is a revision of the list of gasteropoda found 
in the Brassfield limestone published in 1893.^® 
Bellerophon exiguus (Foerste) 
Bellerophon opertus Foerste 
Bucanella trilobata (Conrad) 
Bucania fiscellostriata (Foerste) 
Oxy discus youngi (Foerste) 
Cryptaulus filitextus (Foerste) Gen. nov. 
Lophospira (Ruedemannia ?) inexpectans (Hall and Whitfield) 
Liospira affinis (Foerste) 
Hormotoma subulata (Conrad) 
Cyclonerna daytonense Foerste 
Cyclonema gyronemoides Foerste. Sp. nov. 
Cyclora alta Foerste 
Straparollus incarinatus Foerste 
Diaphorostoma daytonense Foerste. Sp. nov. 
Subulites directus Foerste 
Meekospira planilateralis (Foerste) 
On3^chochilus abruptum (Foerste) 
Oxy discus youngi (Foerste) 
Cyrtolites Youngi Foerste, Proc. Boston Soc. Nat. Hist., 
24, 1889, p. 289, pi. 6, fig. 7; Geol. Surv. Ohio, Pal. 7, 1893, p. 
549, pi. 31, figs. 7, 7a. 
From the cross-section of the t 5 ^pe of the species it is evident 
that the last volution enveloped the carina of the preceding 
volution with a heart-shaped base, as in typical Oxydiscus, the 
conch being narrow and the carina very acute. 
Cryptaulus Gen. Nov. 
Spire low, the successive volutions rising high up on the sides 
of the immediately preceding volutions, and covering the slit- 
band of the latter entirely. The upper part of each volution 
2® Foerste, A. F., Fossils of the Clinton group in Ohio and Indiana: Ohio Geol. 
Surv., vol. 7, 1893, p. 596. 
