Vol. 3 
AUGUST, 1922 
No. 3 
£ 
JOURNAL OF 
MAMMALOGY 
Published Quarterly by the Ameriean Soeiety of Mammalogists 
CONTENTS 
PAGE 
The Breathing of the Florida Manatee G.H. Parker 127 
Rodents and Reclamation in the Imperial Valley Joseph Dixon 136 
A Brown Mutation in the Opossum (Didelphis virginiana) with Remarks upon the 
Gray and the Black Phases in this Species Carl Hartman 146 
Notes on European Fossil Horses Ernst Schwarz 150 
Bats from New Mexico and Arizona Glover M. Allen 156 
The Validity of the Penobscot Field Mouse Leland C. Wyman 162 
The Evolutionary Force of a Wide Range Ernest Thompson Seton 167 
Habits of Some West Coast Seals A. Brazier Howell 170 
Remarkable Changes in the Skull of an American Badger (Taxidea taxus) Due to 
Advanced Age R.W. Shufeldt 173 
Beds of the Gorilla and Chimpanzee C. R. Aschemeier 176 
Diagnoses of Seven New Chipmunks of the Genus Eutamias, with a List of the 
American Species .Arthur H. Howell 178 
General Notes 
Hoary Bat in Vermont, O. L. Kirk; An Instance of Unprovoked Attack by a Brown Bear, A. C. 
Bonebrake; A Coyote in Maryland, H. H. T. Jackson; An Observation on the Carnivorous 
Propensities of the Gray Gopher, A. M. Johnson; The Young of the California Gray Squirrel, 
T. I. Storer. 
Recent Literature 
Fourth Annual Meeting of the American Society of Mammalogists 
List of Members 
190 
199 
203 
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Entered as second-class matter, November 22, 1919, at the PostofEce, Baltimore, Md., under the Act of March 3, 1879. 
Made in United States of America 
