436 GKOLOGY OF OHIO. 



Ancyrocrinus Hall. 

 A. spinosus Hall. 



MOLLUSCA. 

 BRYGZOA Emmerich. 

 Stictopora Hall. 



5". Gilberti Meek. 

 Lichenaua Hall. 



L. lichenoides Meek. 

 BRACHIOPODA. 



Discina Lamarck. 



D. grandis Vanux.? 

 Crania Retzius. 



C. crenistriata Hall. 



C. Hamiitonitz Hall. 

 Orthis Dalman. 



O. Livia Bill. 



O. propinqua Hall. 



O. Vanuxemi Hall. 

 Streptorhynchus King. 



S.flabellum Whitf. 



S. pandora Bill. 

 Strophodonta Hall. 



,S. ampla Hall. 



S. demissa Conrad. 



5". hemispherica Hall. 



5". inequiradiata Hall. 



5". nacrea Hall. 



S. Patersoni Hall. 



S. perplana Conrad. 



5". subdemissa Hall.? 

 Strophomena Rafinesque. 



■S. rhomboidalis Wilck. 

 Chonetes Fischer. 



C. acutiradiata Hall. ( 



C. armata Hall. 



C. deflecta Hall. 



C. mucronata Hall.? 



C. Yandellana Hall. 

 ProductelIvA Hall. 



P. spinulicosta Hall. 

 Spirifera Sowerby. 



►S". acuminata Con. 



S. duodenaria Hall. 



.S. euruteines Owen. 



3*. fimbriaia Con. 



