FOSSIL VERTEBRATES — MAMMALIA 839 
REFERENCES FOR THE MAMMALS HERE DISCUSSED. 
ZITTEL, K. von., Paleontologie, Vol. IV. 
LYDEKKER, R., A Geographical History of Mammals (contains much of 
value upon the distribution of mammals in past time). 
OSBORNE, H, F., The Reports of the American Museum of Natural His- 
tory contains many papers by Osborne, Wortman, Earle, and others upon the 
collections of mammals from the Tertiaries of the United States. These are 
fully illustrated, and are intended as guide books, to a certain extent, to the 
specimens in the museum. Among these are Wortman’s paper upon 
“Ganodonta.”’ 
Corre, E. D., Tertiary Vertebrata, Vol. III. United States Geological 
Survey of the Territories, 1884. 
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