To Prof. 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 Eodentia,'' by 

 Cones and Allen ; of the Mustelidse, from the "Fur-bearing Animals of North America, 

 by Dr. Couea. 



The works of Prof. Baird, Dr. Gill, Audubon and Baohman, and Robert Kennioott 

 have been freely used, and such extracts made from them as seemed j udioious 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. 



