DEVONIAN FISHES OF IOWA 213 



Chemung Group. 



Dipterus nelsoni Newb. (including also D. flabelliformis, levis, 

 minutus, and quadratus) . Warren, Pennsylvania. 



Ganorhynchus beecheri Newb.* Warren, Pennsylvania. 

 Heliodus lesleyi Newb.f Northern Pennsylvania. 



Pobtage Group. 



Dipterus ithacensis Williams. Ithaca beds ; Ithaca, New York. 



Upper Devonian of Canada. 



Scaumenacia curta (Whiteaves).. Scaumenac Bay, Province 

 of Quebec. 



Cleveland Shale of Ohio (Upper Devonian). 



Ctenodus wagneri Newb. Near Cleveland, Ohio. 



State Quarry Beds of Iowa (Upper Devonian). 



Dipterus costatus Eastman. Near North Liberty, Iowa. 

 Dipterus digitatus, sp. nov.f Near North Liberty, Iowa. 

 Dipterus mordax Eastm. Near North Liberty, Iowa. 

 Dipterus pectinatus, sp. nov.§ Near North Liberty, Iowa. 

 Conchodus variabilis, sp. nov.|| Near North Liberty, Iowa. 

 Synthetodus trisulcatus Eastm. Near North Liberty, also 

 Sweetland creek, Iowa. 

 Synthetodus calvini, sp. nov.ff Near North Liberty, Iowa. 



Cedar Valley Limestone (Middle Devonian). 



Dipterus calvini Eastm. Near Fairport, Muscatine county, 

 Iowa. 

 Dipterus uddeni Eastm. Near Buffalo, Scott county, Iowa. 

 Ganorhynchus sp.** Near Waverly, Bremer county, Iowa. 



* Founded on calcified labial cartilage which accompanies dental plates of Dip- 

 terus nelsoni, and may possibly belong to the same species. 



t Regarded by Smith Woodward as belonging to the palatal dentition of Palse- 

 daphus. 



t Gf. infra, p. 221 \Cf. infra, -p. 222. \\Cf. infra, p. 230. ffC/. infra, p. 233. 



** Represented by calcified labial cartilage very similar to that of the type species 

 of Ganorhynchus, and much larger than that of G. beecheri. 



