DEVONIAN FISHES OF IOWA 287 



162. Synthetodus calvini Eastman. State Quarry beds; 

 Johnson county, Iowa. 



CROSSOPTERYGIANS. 



163. Holoptyeliius giganteus Agassiz. Elbert formation; 

 Devon Point, southwestern Colorado. 



164. Holoptyeliius tuberculatus Newberry. Elbert forma- 

 tion; Devon Point, southwestern Colorado. 



Chemtjng-Catskill Group of New York and Pennsylvania. 



OSTRACODERMS. 



165. Botliriolepis minor Leidy. Chemung group; Bradford 

 county, Pennsylvania. Also in the Catskill of Delaware county, 

 New York. 



ELASMOBRANCHS. 



166. Cladodus coniger Hay. Chemung group; Warren, 

 Pennsylvania, and Waverly of Meadville, Pennsylvania. 



167. Cladodus sp. High Point sandstone ; Naples, New York. 



168. Helodus gibberulus Agassiz. Chemung group ; Warren, 

 Pennsylvania. 



169. Rliynchodus pertenuis Eastman. Chemung group; 

 Franklin, New York. 



170. Rliynchodus sp. High Point sandstone; Naples, New 

 York, and base of Waverly, Kentucky. 



171. Homacanthus acinaciformis Eastman. Chemung group; 

 Warren, Pennsylvania. 



172. Ctenacanthus chemungensis Claypole. Chemung group ; 

 New York and Pennsylvania. 



173. Ctenacanthus randalli Newberry. Olean conglomerate; 

 Warren, Pennsylvania, 



174. Gyracanthus shencoodi Newberry. Chemung group; 

 Pennsylvania, and Cattaraugus county, New York. 



ARTHRODIRES. 



175. Coccosteus macromus Cope. Chemung group; Leroy, 

 Pennsylvania. 



176. Dinichthys curtus Newberry. Chemung beds; Warren, 

 Pennsylvania. 



