1 902.] Osborn, Dolichocephaly a7id Brachycephaly in Mammals. 89 



Further investigation and comparison may produce some 

 general law. 



BIBLIOGRAPHY. 



1867. Huxley, Thomas H. On Two Widely Contrasted Forms of 



the Human Cranium. Journ. Anat. Phys., Vol. I, 1867, pp. 



60-77, Figs. 3-7. 

 1873. KowALEVSKY, W. Monographic der Gattung /I )2//tracoi/zerm;7;. 



Palcsontographica, N. F. II, 3 (XXII). 

 1901. Matthew, W. D. Fossil Mammals of the Tertiary of North- 

 eastern Colorado. Alem. Ai)ier. Mus. Nat. Hist., Vol. I, 



Part V, Nov., 1901. 

 1864. Nathusius. Vorstudien zur Geschichte und Zucht der Haus- 



thiere, zunachst am Schweinschadel. Berlin, 1864. 

 1897. OsBORN, Henry F. The Cranial Evolution of Titanotherium. 



Bull. Amer. Mus. Nat. Hist., Vol. VIII. Art. IX, pp. 157- 



197, 1897. 

 1900. OsBORN, Henry F. Pylogeny of the Rhinoceroses of Europe. 



Bull. Amer. Mus. Nat. Hist., Vol. XIV, 1900, p. 229. 

 1885. TopiNARD. — "General Anthropology." Reviewed in Nature, 



1885, Vol. XXXIII, p. 4. 

 1899. WoRTMAN, J. L., and W. D. Matthew. The Ancestry of 



Certain Members of the Canidae, Viverridae, and Procyonidae. 



Bull. Amer. Mus. Nat. Hist., Vol. XII, Art. VI, pp. 109-138, 



