136 POTTS VILLE FAUNA OF OHIO 



Feet Inches 



Coal, Brookville 1 6 



Clay 1 



Flint, gray to black,- Black Flint 6 



Coal 2 6 



The species listed below were obtained: 



Lophophyllum profundum (Milne-Edwards and Haime) 

 Crinoid segments 

 Archaeocidaris spines 

 Spirorbis sp. 



Fenestella delicatula Ulrich 

 Fenestella shumardi Prout ? 

 Fenestella venusta Mather ? 

 Fenestellids undetermined 

 Septopora biserialis (Swallow) 

 Prismopora sereata (Meek) 



Orbiculoidea meekana (Whitfield) 



Derbya crassa (Meek and Hayden) 



Chonetes mesolobus Norwood and Pratten 



Productus cora d'Orbiguy 



Productus semireticulatus (Martin) 



Pustula nebraskensis (Owen) 



Marginifera muricata var. missouriensis Girty 



Marginifera wabashensis (Norwood and Pratten) 



Spiriferina kentuckyensis (Shumard) 



Spirifer boonensis Swallow? 



Spirifer cameratus Morton 



Spirifer opimus Hall 



Squamularia perplexa (McChesney) 



Composita subtilita (Hall) 



Parallelodon tenuistriatus (Meek and Worthen) 

 Myalina swallovi McChesney 

 Myalina pernaformis Cox 

 Schizodus wheeleri Swallow 

 Aviculopecten coxanus Meek and Worthen 

 Aviculopecten herzeri Meek 

 Deltopecten scalaris (Herrick) 

 Acanthopecten carboniferous (Stevens) 



Trachydomia sp. with Spirorbis sp. 



The Black Flint in Spook Hollow, southwestern part of Section 23, 

 one and one-half miles east of McArthur, was also examined for fossils, 

 but a few fragments of Lepidodendron sp. constituted the only form 

 which was obtained. The following section was measured here (Lo- 

 cality 93) : 



