DEVONIAN FISHES OF IOWA 279 



52. Dinichthys tuberculatus Newberry. Cedar Valley lime- 

 stone ; Iowa. Hamilton limestone ; Milwaukee, Wisconsin. Also 

 in the New Albany or Genesee black shale near Louisville, Ken- 

 tucky, and typically in the Chemung of Warren, Pennsylvania. 



53. Dinichthys canadensis Whiteaves. "Cuboides zone" of 

 the Devonian ; Manitoba. 



54. Aspidichthys (?) notabilis Whiteaves. Hamilton lime- 

 stone; Ontario. "Cuboides zone" of the Devonian; Manitoba. 



55. Sphenophorus ("Oestophorus") sp. Hamilton lime- 

 stone; Milwaukee, Wisconsin. 



CTENODIPTERINES. 



56. Dipterus ealvini Eastman. Cedar Valley limestone; 

 Fairport, Iowa. 



57. Dipterus uddeni Eastman. Cedar Valley limestone; 

 Buffalo, Iowa. 



58. Dipterus sp. Labial cartilage of a large undescribed 

 form collected by Professor W. H. Norton in the Cedar Valley 

 limestone at Waverly, Bremer county, Iowa, and now preserved 

 in the collection of Cornell College, Mount Vernon, Iowa. 



CROSSOPTERYGIANS. 



59. Onychodus sigmoides Newberry. Onondaga limestone; 

 New York. Columbus and Delaware limestones ; Ohio. Either 

 this or a closely similar species occurs also in the Hamilton of 

 Milwaukee, Wisconsin, and Cedar Valley limestone of Bremer 

 county, Iowa. 



60. Onychodus sp. indes. Hamilton limestone; Milwaukee, 

 Wisconsin. 



61. Eoloptychius scales. Lower Hamilton; Oran, New York, 

 and Cedar Valley limestone, Iowa. 



Middle or Upper Devonian of Kentucky. 



62. Tamiobatis retustus Eastman. Powell county, Kentucky. 



