DEVONIC FISHES OF THE NEW YORK FORMATIONS I I 



Classification of the New York Devonic according to James D. Dana 



DESCENDING ORDER 



C 



'S 

 o 

 > 



V 



Q 



TT T^ • r-u f Chemung- 



Upper Uevonian . . Lhemung I p ^ 



i\T- 1 11 i-i • XT -1. f Hamilton, TuUy 



Middle Uevonian . . Hamilton { t.^ ,, ' ■' 



\ Marcellus 



• rn -r ( Corniferous, Schoharie, 



f L-orniierous { r^ , ^ „. 



1 ( Cauda Galli 



Lower Devonian . . i 



I 



[ Oriskany Oriskany 



Classification of the Ohio Devonic according to Charles S. Prosser 



6 



C 



o 

 > 



Q 



Southern and Central Ohio Northern Ohio 



( { Cleveland shale 



Neodevonic -< Ohio shale \ Chagrin formation 



Huron shale 



{ Olentangy shale 



Mesodevonic \ Delaware limestone 



( Columbus (including "Sandusky") limestone 



Paleodevonic Wanting Wanting 



The definitions that are given of species and genera are based largely 

 upon the writer's investigation of actual specimens, often including the 

 original types, although due account has been taken of the diagnoses of 

 earlier authors. Most of the definitions of higher groups are adopted with 

 but little modification from the special literature. For the loan of speci- 



