176 POTTSVILLE FAUNA OF OHIO 



r; Muskingum County, Locality 27, r; Licking County, Localities 46, 

 49, r; Stark County, Locality 52, r. McArthur limestone: Jackson 

 County, Locality 80, r. 



\ . 

 Genus Schizophoria King 



Schizophoria altirostris (Mather) 



1916 RhipidomeUa altirostris. Mather, Bull. Den. Univ., Vol. XVIII, p. 143, PI. VIII, 

 Figs. 5-7c. 

 Hale formation: East Mountain, Fayetteville, Arkansas. 



Description. This species is represented in the collections studied 

 by a single well-preserved individual. The shell is partially exfoliated, 

 but where present shows a surface sculpture of extremely fine radi- 

 ating lines. Schizophoria resupinoides is a very closely related, but 

 much larger form; as pointed out by Price 1 the two species differ chiefly 

 in size. In lieu of characters in the specimen studied which will defi- 

 nitely assign it to one or the other species, it is deemed best to refer 

 it to S. altirostris on the basis of size, although it is slightly larger than 

 average individuals of this species. 



Dimensions. Length 22 mm., width 26 mm., convexity 17 mm. 



Horizon and locality. Lower Mercer limestone: Licking County, 

 Flint Ridge, Locality 48, r. 



Schizophoria sp. 



Remarks. A few small brachiopods belonging to the genus Schizo- 

 phoria are present in the Harrison ore, but are too poor for specific 

 identification. They occur as internal molds on which faint traces of 

 very fine surface sculpture are visible. 



Horizon and locality. Harrison ore: Jackson County, Locality 

 1, r. 



Genus Derbya Waagen 



Derbya crassa (Meek and Hayden) 

 PI. VII, figs. 9, 10 



1852 Orthis umbraculum ? Hall, Stansb. Exped. Gt. Salt Lake, p. 412, PI. 3, Fig. 6. 



Carboniferous: Missouri River, above Fort Leavenworth. 

 1852 Orthis umbraculum ? Owen, Geol. Rep. Wis., Iowa, and Minn., PI. 5, Fig. 11. 



Carboniferous: Missouri River, near mouth of Keg Creek, and at Council 



Bluffs. 



, W.IA., Geol. Surv. W. Va., Raleigh, Wyoming, McDowell and Adjacent 

 Co. Rept., pp 1694-698, 1916. 



