290 IOWA GEOLOGICAL SURVEY 



CROSSOPTERYGIANS. 



205. Eoloptychius americanus Leidy. Tioga county, Penn- 

 sylvania. 



206. EoloptycMus giganteus Agassiz. Tioga county, Penn- 

 sylvania. 



207. Holoptychius halli Newberry. Delhi, New York. 



208. Holoptychius radiatus Newberry. Blossburg, Pennsyl- 

 vania. 



209. Sauripteris taylori (Hall). Blossburg, Pennsylvania. 



210. Glyptopomus sayrei Newberry. Susquehanna river near 

 mouth of Mehoopany. 



