[428] See also Duckworth, Proc. Zool. Soc. 1898, p. 989.
[429] For the structure of this Ape see Beddard, Trans. Zool. Soc. xiii. 1893, p. 177; and for experiments on her intelligence, Romanes, Proc. Zool. Soc. 1889, p. 316.
[430] For the external appearance of the Orang see Hermes, Zeitschr. f. Ethn. 1876, a paper which has coloured plates.
[431] Pithecanthropus erectus. Eine menschenähnliche Uebergangsform aus Java, Batavia, 1894. See also Ernst Haeckel, The Last Link (with notes by H. Gadow), London, 1898; Manouvrier, Amer. Journ. Sci. 1897, p. 213 (extracts); and Klaatsch, Zoolog. Centralbl. vi. 1899, p. 217.
[432] See especially Wiedersheim, The Structure of Man, transl. by Howes, London, 1895.
[433] Cunningham, "Cunningham Memoirs," No. II. Royal Irish Acad. 1886.