OSBORN — ZOOLOGIC AND PAL^ONTOLOGIC RESEARCH 
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Fig. 1. Skull Proportions Among Titanotheres 
A, Brachycephaly, short-headed, Palceosyops major. B, Mesaticephaly, 
medium-headed, Manteoceras manteoceras. C, Dolichocephaly,] long-headed, 
DoUchorhinus hyognathus. 
Fig. 2. Skull Proportions Among Canids 
A, Primitive, subdolichocephalic {Daphcenus hartshornianus) . B, Brachy- 
cephalic (bulldog). C, Dolichocephalic (Russian wolf-hound). 
