58 POTTSVILLE FAUNA OF OHIO 



Productus semireticulatus (Martin) 



Pustula nebrasKensis (Owen) 



Marginifera muricata var. missouriensis Girty 



Marginifera wabashensis (Norwood and Pratten) 



Spiriferina kentuckyensis (Shumard) 



Spirifer cameratus Morton 



Spirifer opimus Hall 



Squamularia perplexa (McChesney) 



Composita subtilita (Hall) 



Nuculopsis ventricosa (Hall) 



Parallelodon tenuistriatus (Meek and Worthen) 



Myalina swallovi McChesney 



Aviculopecten coxanus Meek and Worthen 



Aviculopecten herzeri Meek 



Acanthopecten carboniferous (Stevens) 



Crenipecten foerstii Herrick 



Lima retifera Shumard 



Allerisma terminale Hall 



Pleurophorus tropidophorus Meek 



Astartella varica McChesney 



Pharkidonotus percarinatus (Conrad) 

 Euphemus carbonarius (Cox) 

 Euphemus nodocarinatus (Hall) 

 Pleurotomaria newportensis White 



In Washington Township, one mile east of Gilbert, the hard, blue 

 Lower Mercer limestone is exposed in the bed of Blount Run. The 

 extreme hardness of the limestone, however, renders collecting very 

 difficult. The Blount Run section is given below (Locality 37): 



Section along Blount Run, Washington Township, Muskingum County 



Feet Inches 



Sandstone, massive 30 



Flint, black, fossiliferous \ Upper Mercer ___ f - 6 



Limestone, fossiliferous I 8 



Shale - 2 



Coal r -__] f -_ 3 



Shale > Bedford J __ 1 



Coal, bony J t __ 8 



Clay -- 4 



Covered 6 



Sandstone, shaly 7 



Limestone, shaly, fossiliferous "i f 1 11 



Limestone, hard, blue, fossiliferous I Lower Mercer I - 7 



Shale 



Limestone, hard, blue, fossiliferous J I 1 6 



Shale, with coal bands _- 4 



Coal, bony, Middle Mercer __ 8 



Clay, siliceous 1 



Sandstone, shaly__ o 



