DESCRIPTION OF SPECIES 161 



Fenestella venusta Mather? 



1915 Fenestella venusta. Mather, Bull. Den. Univ., Vol. XVIII, p. 114, PI. IV, 

 Figs. 9-10a. 

 Morrow Group: Arkansas and Oklahoma. 



Remarks. A species of Fenestella very closely related to F. venusta, 

 is common in the Black Flint member. Unfortunately all the speci- 

 mens observed were too poorly preserved to be identified with confidence. 



Horizon and locality. Black Flint member: Jackson County, 

 Locality 87, c; Vinton County, Localities 91, 92, c. 



Fenestella, several species 



Remarks. Specimens belonging to the genus Fenestella, which 

 are too poorly preserved to be identified specifically, were found in the 

 Lower and Upper Mercer members at the localities listed below. Prob- 

 ably several species are represented. 



Horizon and locality. Lower Mercer limestone: Scioto County, 

 Locality 31, c; Jackson County, Locality 32, r. Upper Mercer member: 

 Muskingum County, Locality 68, r. 



Genus Polypora McCoy 

 Polypora fastuosa Foerste 



1887 Polypora fastuosa. Foerste, Bull. Den. Univ., Vol. 2, p. 82, PI. 7, Figs. 9 a-d. 

 Coal Measures: Flint Ridge and Bald Knob, Ohio. 



Remarks. Specimens agreeing with the form described by Foerste 

 as Polypora fastuosa are common in the Lower Mercer limestone of 

 Muskingum and Licking counties and occur less abundantly in the 

 McArthur member. Considerable variation exists in the size of indi- 

 viduals, and Foerste suggests that two distinct species, differing prin- 

 cipally in size, may be included in the term; however, as the material 

 at hand is for the most part rather poor, a subdivision is at present 

 unjustifiable. 



Horizon and locality. Lower Mercer limestone: Perry County, 

 Locality 35, c; Muskingum County, Localities 43, 45, c; Licking County, 

 Localities 46, Flint Ridge, 47, 48, 49, c. McArthur limestone: Hocking 

 County, Locality 86, r. 



Polypora, several species 



Remarks. A few specimens of bryozoans belonging to the genus 

 Polypora were obtained from the Lower Mercer limestone, but no 



6 G. B. 25. 



