AUTHORITIES CITED 
The numbers preceding the titles are those by which the books are referred to in 
the raised figures in the lines of the text. 
Those works in the following list which are text-books are numbered 1, 2, 16, 37, 
59, 60, 84, 95, 98, and 135, 
Ts, 
Huxtey, T. H., Anatomy of Vertebrated Animals. (New York, 1878.) 
2. Parker, T. J., and Haswe i, W. A., Text-book of Zodlogy. (New 
T4. 
15. 
York, 1897.) 
Forses, H. O. A Handbook to the Primates. (Allen’s Naturalist’s 
Library ; London, 1894.) 
.. Dugors, EUGENE. Article in Anatomischer Anzeiger, Vol. XII, trans- 
lated into English and reprinted in the Smithsonian Report for 
1898. See also Marsh, Am. Journal of Science, Vol. I, 1896. 
Huxiey, T. H. Man’s Place in Nature. (Collected Essays, Lon- 
don, 1894.) 
Du CaaiLtu, Pau. Explorations and Adventures in Equatorial 
Africa. (New York, 1861.) Gorilla Land. (New York, 1868.) 
HartMANN, Ropert. Anthropoid Apes. (International Scientific 
Series, New York, 1886.) 
LivincsToneE, Davip. Last Journals ; edited by H. Walter. (Lon- 
don, 1874.) See also Johnston’s Livingstone and the Exploration 
of Central Africa. (London, 1897.) 
SCHWEINFURTH, GEoRG. The Heart of Africa. (London, 1874.) 
LyDEKKER, RicHarD (editor). The Royal Natural History. (6 vols., 
London, 1895 +.) Reissued in New York as ‘‘ The New Natural 
History.” , 
. Kiptrne, J. S. Beast and Man in India. (London, 189r.) 
. Wattace, ALFRED Russet. The Geographical Distribution of 
Animals. (New York, 1875.) Other important authorities on this 
subject are Murray, Sclater, Newton, Gadow, Beddard, Lydekker, 
Heilprin, Merriam, and Allen. 
Romanes, J. G. Article in Proceedings Zodlogical Society of London, 
1889. 
Martin, M. Natural History of Mammiferous Animals, with a 
Particular View of the .. Monkeys. (London, 184r.) 
Broperip, W. J. Zodlogical Recreations. (Philadelphia, 1849.) 
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