126 POTTSVILLE FAUNA OF OHIO 



Feet Inches 



Sandstone, yellow 20 



Shale, gray 18 



Shale, blue, fossiliferous 1 f 4 8 



Limestone, argillaceous, very fossilifer- >- Me Arthur i 



ous J L -- n 



Coal, Tionesta __ (3 



Clay 14 



The forms listed below were identified: 



Crinoid segments and plates 



Fenestella shumardi Prout ? 

 Polypora fastuosa Foerste 

 Fenestellidae undetermined 

 Rhombopora lepidodendroidea Meek 

 Prismopora sereata (Meek) 



Orbiculoidea meekana (Whitfield) 

 Derbya crassa (Meek and Hayden) 

 Chonetes. mesolobus Norwood and Pratten 

 Productus cora d'Orbigny 

 Productus semireticulatus (Martin) 

 Pustula nebraskensis (Owen) 

 Spiriferina kentuckyensis (Shumard) 

 Spirifer cameratus Morton 

 Spirifer opimus Hall 

 Squamularia perplexa (McChesney) 

 Ambocoelia planoconvexa (Shumard) 

 Composita subtilita (Hall) 



Parallelodon tenuistriatus (Meek and Worthen) 

 Entolium aviculatus (Swallow) 

 Pleurophorella costata (Meek and Worthen) 

 Astartella compacta Girty 

 Astartella concentrica (Conrad) 

 Astartella varica McChesney 



Pharkidonotus percarinatus (Conrad) 

 Patellostium montfortianum (Norwood and Pratten) 

 Pleurotomaria carbonaria Norwood aud Pratten 

 Naticopsis nanus (Meek and Worthen) 



Pseudorthoceras knoxense (McChesney) 

 Coloceras sp. 

 Metacoceras sp. 



Perry County. In Perry County the stratum is generally notably 

 thick. It consists of limestones and calcareous shales, both of which 

 are fossiliferous. No collections were made in the county but the 

 following sections will show the lithologic character of the member and 

 its relations to the strata below: 



