60 POTTSVILLE FAUNA OF OHIO 



Lima retifera Shumard 

 Allerisma terminale Hall 

 Astartella concentrica (Conrad) 



Pharkidonotus percarinatus var. tricarinatus (Shumard) 

 Euphemus nodocarinatus (Hall) 

 Trepospira depressa (Cox) 

 Trachydomia sp. 



Pseudorthoceras knoxense (McChesney) 



In the ravine of another small stream flowing from the east into 

 the Muskingum River, about one mile north of the above locality, only 

 a few forms were collected from the hard, blue limestone, although 

 abundant remains were obtained from the soft, gray shale which over- 

 lies the limestone (Locality 39). The forms listed below were found: 



FOSSILS PROM THE LOWER MERCER LIMESTONE 

 Crinoid segments 



Chonetes mesolobus Norwood and Pratten 



Productus cora d'Orbigny 



Pustula nebraskensis (Owen) 



Marginifera wabashensis (Norwood and Pratten) 



Spiriferina kentuckyensis (Shumard) v 



Squamularia perplexa (McChesney) 



Composita subtilita (Hall) 



Posidonia sp. 



Entolium aviculatus (Swallow) 

 Euchondria neglecta (Geinitz) 

 Astartella concentrica (Conrad) 



FOSSILS FROM THE SHALE ABOVE THE LIMESTONE 

 Lophophyllum profundum (Milne-Edwards and Haime) 

 Crinoid segments very abundant 

 Rhombopora lepidodendroidea Meek 



Orbiculoidea meekana (Whitfield) 



Derbya crassa (Meek and Hay den) 



Chonetes mesolobus Norwood and Pratten 



Productus cora d'Orbigny 



Productus semireticulatus (Martin) 



Pustula nebraskensis (Owen) 



Marginifera wabashensis (Norwood and Pratten) 



Spiriferina kentuckyensis (Shumard) 



Squamularia perplexa (McChesney) 



Composita subtilita (Hall) 



Schizodus curtus Meek and Worthen 

 Aviculopecten herzeri Meek 

 Allerisma terminale Hall 

 Astartella concentrica (Conrad) 

 Cypricardinia ? carbonaria Meek 



Euphemus nodocarinatus (Hall) 



