DEVONIC FISHES OF TFIE NEW YORK FORMATIONS 



167 



more closely with Rhizodonts, and is definitely assigned to that family by 

 Woodward. The enlarged scale ornament of the type specimen described 

 by Hall is shown in plate 7, figure 9. A fairly accurate concept of the 

 appearance presented by several Crossopterygian and other typical Devonic 

 fishes is afforded by the restoration given in text figure 35, for which we are 

 indebted to Mr F. A. Lucas, author of Animals before Man in Nortli 

 America and other popular works. 



Pteraspis. 

 Glyptotemus. 



Coccostcus. 

 Ccphalaspis. 



Osteolepis. 



Devonian Fishes. 



Holoptychius. 



Pterichthys. 



The most commonly occurring scales of Holoptychius in the American 

 Devonic, and at the same time the most widely distributed, are those of 

 H. g i g" a n t e u s Agassiz, and H. americanus Newberry. They are 

 found not only in the Catskill of New York and Pennsylvania, (H. ameri- 

 canus occurs in the Chemung of Delaware county as well), but also in the 

 Upper Devonic of southwestern Colorado, The scales of H. giganteus 



