50 POTTS VILLE FAUNA OF 'OHIO 



Derbya crassa (Meek and Hayden) 



Derbya robusta (Hall) 



Choneteg choteauensis Mather 



Aulacorhynchus millepunctatus (Meek and Worthen) 



Productus cora d'Orbigny 



Productus semireticulatus (Martin) var. 



Pustula nebraskensis (Owen) 



Spiriferina kentuckyensis (Shumard) 



Spirifer boonensis Swallow? 



Composita subtilita (Hall) 



Pteria ohioense (Herrick) 

 Schizodus wheeleri Swallow 

 Aviculopecten coxanus Meek and Worthen 

 Deltopecten scalaris (Herrick) 

 Acanthopecten carboniferous (Stevens) 

 Entolium aviculatus (Swallow) 

 Lima retifera Shumard 

 Allerisma terminale Hall 



Pharkidonotus percarinatus (Conrad) 

 Euphemus carbonarius (Cox) 

 Pleurotomaria carbonaria Norwood and Pratten 

 Schizostoma catilloides (Conrad) 



Jackson County. In the eastern part of Section 10, Coal Town- 

 ship, the Lower Mercer member outcrops in several places. The 

 accompanying geologic section, which also includes the Lower Mercer 

 or Little Red Block ore, was measured in the hollow east of Grace 

 mine (Locality 11). 



Section measured in the hollow east of Grace Mine, Coal Township, 



Jackson County 



Feet Inches 



Ore, Upper Mercer __ 4 



Covered 10 



Coal blossom __ 



Clay shale 2 



Shale and covered 11 



Clay shale 2 



Sandstone, shaly 7 



Shale and covered 8 6 



Coal 1 - _- 6 



Clay . 2 



Shale 4 7 



Ore, Lower Mercer __ 5 



Shale ---- 3 



Covered ^ 5 3 



Shale, blue 5 



Limestone, gray, fossiliferous 1 11 



Shale, dark, fossiliferous > Lower Mercer < 1 10 



Limestone, blue, fossiliferous . J L 1 



