To Pror. J. S. NEWBERRY, Chief Geologist: 
Dear Sir: The account of the Mammals of Ohio herewith submitted is mainly com- 
piled from the standard authorities on North American Mammals. The descriptions of 
the Rodents is largely drawn from the ‘‘ Monograph of North American Rodentia,” by 
Coues and Allen; of the Mustelide, from the ‘‘ Fur-bearing Animals of North America, 
by Dr. Coues. 
The works of Prof. Baird, Dr. Gill, Audubon and Bachman, and Rebert Kennicott 
have been freely used, and such extracts made from them as seemed judicious and neces- 
sary. 
I am also indebted to Mr. Frank W. Langdon, of Madisonville, Hamilton county, Ohio, 
for valuable lists, field-notes, and other information, drawn chiefly from early histories 
of Ohio; to Mr. E. W, Nelson, U.S. A., of Chicago, for notes on distribution; to Dr. D. 
S. Jordan, whose Manual of Vertebrates has been followed in the serial arrangement of 
the species, for use of books and specimens, and for the revision of proof-sheets, and for 
other favors. 
It is deemed best to include, in this Monograph, not only the wild animals still living 
in the State, but also those exterminated within the period of settlement. 
Very respectfully, 
A. W. BRAYTON. 
Irvington, Ind., Oct. 3, 1878. 
