98 GEOLOGY OF OHIO. 



FISHES. 



Ctenacanthus formosus Newb. 



Ct. furcicarinatus 



Ct. triangularis 



Gyracanthus compressus 



G. Alleni 



Orodus variabilis 



Cladodus Pattersoni 



Cladodus horridus 



Helodus coniculus N. andW. 



Palseoniscus Brainerdi Thomas. 



Polyrhizodus modestus Newb. 



MOLLUSKS. 



Trematodiscus trisulcatus M. and W. 



Goniatites Andrewsi Win. 



G. Lyoni M. and W. 



G. Ohioensis Win. 



Orthoceras Indianense Hall. 



Conularia Newberryi Win. 



C. micronema Meek. 



O. byblis White. 



Producta semireticulata Flem. 



Producta Flemingi Sow. 



Producta Cora D'Orb. 



Productella Newberryi Hall. 



Lingula melia " 



L. Cuyahoga " 



L. membranacea Win. 



Discina Newberryi Hall. 



Hemipronites crenistria Phil. 



Chonetes Logani Hall. 



Orthis Michelini L'Ev. 



Spirifera camerata Mort. 



Spiriferina solidirostris White. 



Syringothyris typa Win. 



Rhynchonella Sagareana " 



R. Missouriensis .Swallow. 



Aviculopecten Caroli Win. 



A. crenistria " 



A. Newarkensis " 



A. Winchelli Meek. 



Microdon reservata Hall. 



Macrodon Hamiltonise " 



Palaeoneilo Barrisi " 



P. attenuata " 



Schizodus Medinaensis Meek. 



13. subtrigonalis " 



