U. S. NORTH ERIiT BOUNDARY COMMISSION: 



ARCHIBALD CAMPBELL, Esq., Commissioner. 



^l\j. W. J. TWINING, U. S. Engrs., Chief Astronomer. 



N ATUR AL HISTORY. 



No. I. 

 ON THE MURIDJ^:. 



BY 



Dr. ELLIOTT COUES, U. S. Army, 



SURGEON AND NATURALIST OF THE COMMISSION. 



REISSUED, WITH ADDITIONS, 



FROM THE 



proceedings of the academy of natural sciences of PHILADELPHIA, 1874. 



PHILADELPHIA. 

 COLLINS, PRINTER. 



1874. 



