278 IOWA GEOLOGICAL SURVEY 



38. Machaer acanthus sulcatus Newberry. Delaware lime- 

 stone; Ohio and Canada. Onondaga limestone; New York. 

 G-aspe series; Province of Quebec. 



39. Machaer acanthus major Newberry. Columbus and Dela- 

 ware limestones; Ohio. 



40. Machaer acanthus longaevus Eastman. Lower Hamilton; 

 Eighteen Mile creek, New York, and (?) Hamilton limestone 

 of Milwaukee, Wisconsin. 



41. Cyrtacanthus dentatus Newberry. Columbus and Dela- 

 ware limestones; Ohio. 



ARTHRODIRES. 



42. Macropetalichthys rapheidolabis Norwood and Owen. 

 Columbus and Delaware limestones; Ohio and Indiana, also from 

 rocks of equivalent age in Ontario and James Bay region, Can- 

 ada, but probably not in Kentucky and certainly not in Iowa, 

 as has sometimes been claimed. Onondaga limestone; Le Roy, 

 New York. 



43. Asterosteus stenocephalia Newberry. Delaware lime- 

 stone; Ohio. 



44. Coccosteus sp. Onondaga limestone; Clifton Springs, 

 New York. 



45. Coccosteus occidentalis Newberry. Delaware limestone; 

 Ohio. 



46. Coccosteus (Liognathus) spatidatus Newberry. Dela- 

 ware limestone; Ohio. 



47. Protitaniclithys fossatus Eastman. Delaware limestone ; 

 Delaware, Ohio. 



48. Dinichthys precursor Newberry. Columbus limestone; 

 Columbus, Ohio. 



49. Dinichthys hahnodeus (Clarke). Marcellus shale; Li- 

 vonia and Manlius, New York. 



50. Dinichthys lincolni Claypole. Marcellus shale; Geneva, 

 New York. 



51. Dinichthys pustulosus Eastman. Cedar Valley lime- 

 stone; Iowa and Illinois. Hamilton limestone; Milwaukee, "Wis- 

 consin. Also as a recurrent form in the Oneonta beds (Portage) 

 of New York. 



