108 



POTTSVILLE FAUNA OF OHIO 



Pustula nebraskensis (Owen) 



Marginifera muricata var. missouriensis Girty 



Marginifera wabashensis (Norwood and Pratten) 



Spirifer opimus Hall 



Squamularia perplexa (McChesney) 



Composita subtilita (Hall) 



Parallelodon tenuistriatus (Meek and Worthen) 

 Schizodus wheeled Swallow 



About one mile southeast of Locality 70 the Upper Mercer member 

 outcrops in the same roadbed. Here it attains a maximum thickness 

 of 15 feet and is composed of both limestone and black flint (Locality 

 71). The character of the stratum may be seen in the section below: 



Allegheny formation 



Limestone, gray, fossiliferous, Putnam Hill 



Pottsville formation 



Shale and covered 



Flint, light gray, fossiliferous 



Flint, black, fossiliferous 



Limestone, shaly 



Limestone, shaly, parts covered, 



fossiliferous- 



Flint, black, with gray limestone, 

 fossiliferous _ _ 



Upper Mercer 



Feet 



6 



26 



2 



8 



3 

 1 



Inches 



8 

 2 



The collection below was made only from the flinty phase: 



Fusulina secalica (Say) 



Lophophyllum profundum (Milne-Edwards and Haime) 



Crinoid segments 



Rhombopora lepidodendroidea Meek 

 Septopora biserialis (Swallow) 

 Septopora biserialis var. gracilis (Meek) 

 Prismopora sereata (Meek) 



Derbya crassa (Meek and Hayden) 



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) 



Astartella concentrica (Conrad) 



One mile north of Locality 71 the member is exposed on the Wheeler 

 farm along the slope of the ridge east of the north-and-south road. 



