[1588] Schaaffhausen, ‘On the Primitive Form of the Human Skull,’ in ‘The Anthropological Review,’ vol. vi. p. 416.

[1589] Ibid., p. 419.

[1590] Waitz, ‘Introduction to Anthropology,’ pp. 53, et seq. Cf. de Quatrefages, loc. cit. p. 254.

[1591] ‘Edinburgh Medical Journal,’ vol. xxxi. pt. ii. p. 852.

[1592] Joest, in ‘Verhandl. Berl. Ges. Anthr.,’ 1885, p. 475. Cf. Peschel, loc. cit. pp. 19, et seq.

[1593] ‘Verhandl. Berl. Ges. Anthr.,’ 1885, p. 377.

[1594] Cf. Pouchet, ‘The Plurality of the Human Race,’ p. 92; Virchow, in ‘Verhandl. Berl. Ges. Anthr.,’ 1885, p. 213.

[1595] ‘Verhandl. Berl. Ges. Anthr.,’ 1885, p. 475, note.

[1596] Squier, ‘The States of Central America,’ p. 56.

[1597] Godron, loc. cit. vol. ii. p. 276.