MONOGRAPHS OF THE 
AMERICAN SOCIETY OF MAMMALOGISTS 
These monographs are a series of publications 
similar in character to articles published in The 
Journal of Mammalogy, but not suitable for 
periodical publication because of their length or 
for other reasons. 
The plans for this Series are broad and compre- 
hensive, and contemplate the publication of 
works covering all phases of technical and popular 
mammalogy. 
The Monographs and The Journal of Mammalogy 
are issued under the auspices of the American 
Society of Mammalogists. 
Information regarding these monographs may 
be obtained from the Secretary of the American 
Society of Mammalogists, A. Brazier Howell, 
U. S. National Museum, Washington, D. C., or 
the Publishers, The Wiliams & Wilkins Com- 
pany, Baltimore, U. S. A. 
This series is edited by Hartley H. T. Jackson, 
Bureau of Biological Survey, Washington, D. C. 
Ethel M. Johnson and Emma M. Charters as- 
sisted in editing Monograph 2. 
