24:2 yew Species of Fossih from Ohio. 



0. Neiuherryi, Meek. 

 Mackocheilus, Phillips. 



M. ^Jriscus, Whitf. 

 Pleukotomaria, De France. 



P: adjutor, Hall. 



P. Doris, Hall. 



P. Hehe, Hall. 



P. Lucina, Hall. 

 MuiiCHisoNiA, De Venienil. 



M. desiderata, Hall. 



M. Mai a, Hall. 



M. ohsoleta, Hall. 

 Dentalium, Linnaeus. 



D. Martini, Whitf. 

 Bellekophoist, Moutfort. 



B. Netoherryi, Meek. 



B. Pelops, Hall. 



B. projnnqtta, Meek. 

 PTEROPODA. 



CoxuLARiA, Miller. 



C. elegantuki, Meek. 

 Tentaculites, Schloth. 



T. scicula, Hall. 

 CEPHALOPODA. 



Orthooeras, Breynius. 



0. nuntium, Hall. 



0. Oliioense, Hall. 



0. profundum, Hall. 

 Trematoceras, Whitf. 



T. Oliioense, Whitf. 

 Gomphoceras, Sowerby. 



G. ampliora, Whitf. 



G. eximium, Hall. 



G. Hyatti, Wliitf. 



G. Sciotense, Whitf. 

 Cyrtoceras, Goldfuss. 



C. cretaceum, Whitf. 



C. Oliioense, Meek. 



61 undulatum, Vanuxem ? 



