278 MONROE AND TELLER 



A partial correlation of the fish remains has been furnished 

 us by Professor Eastman. It is as follows : 



Dinichthys pustidosus, Eastman — Hamilton Group of Iowa, Illi- 

 nois and New York ; Upper Devonian of Iowa. 



D.tiibercidatus, Newberry — Chemung Group of Pennsylvania ; 

 Upper Devonian of Belgium. 



Ptyctodus calceohis, N. & W. — Hamilton Group of Iowa, Illinois, 

 Missouri, Manitoba ; Upper Devonian of Iowa. 



Heter acanthus uddeni, Lindahl — Hamilton Group, Buffalo, la. 



Onychodtis sigmoides, Newberry — Corniferous Group of Ohio 

 and New York ; Chemung Group, Delaware county, N. Y. 



Acantholepis fragilis, Newberry — Corniferous of Ohio & New 

 York. 



Sphenophorus , sp. — Chemung Group of Pennsylvania {S.lilleyi 

 Newb.) 



Note. — In the following tables the position of the various 

 species in the different subdivisions is indicated according to 

 their relative abundance by the letter A, abundant ; C, common ; 

 O, occasional ; R, rare. 



