438 GEOLOGY OF OHIO. 



Goniophora Phillips. 



G. perangulata H. and W. 

 Paracyclas Hall. 



P. lirata Conrad. 



P. Ohioensis Meek=/". lirata Conrad. P. occidentalis H. 

 and W. 

 Modiomorpha H. and W. 



M. elliptua?. 



M. perovata Meek. - 

 Sanguinolites McCoy. 



5. Sandusky ensis Meek. 



GASTEROPODA. 



Platyceras Conrad. 



P. attenuatum Meek. 



P. bucculenlum Hall. 



P. carinatum Hall. 



P. conicum Hall. 



P. dumosum Conrad. 



P. multispinosum Meek. 



P. squalodens Whitf. 

 Platyostoma Conrad. 



P. lichas Hall. 

 Euomphalus Sowerby. 



E. Decewi lS\\\m.gs==Pleuronotus Decewi Hall. 

 ^Furbo Klein? 



T. Kearneyi ~H.al\=Palceotrochus Kearneyi. 



T. Skumardi D'Vern. 

 Isonema M. and W. 



/. bellatula H.a\\=Cal/onema bellatula Hall. 



/. depression M. and W. 



/. humile Meek. 

 Xenophora Fischer. 



X. antiqua Meek. 

 Naticopsis McCoy. 



N. cequistriata Meek. 



N. cretacea H. and W. 



N. levis Meek. ^ 



IvOxonema Phillips. 



L. Leda Hall. 



L. Hamiltonim Hall. 



L. pwvulum Whitf. 



L. pexatum Hall. 

 Orthonema M. and W. 



O. Newberryi Meek. 



