[5] Consult: Haeckel, Anthropogenie; E. Perrier, Les Colonies animales et la Formation des Organismes; Richet, L'Effort vers la Vie, et la Théorie des Causes finales.
[6] Correns: Concerning the Laws of Heredity.
[7] Translator's note.
[8] Translator's note.
[9] De Giovanni, Op. cit., p. 236. Cases referring to the first morphologic combination.
[10] De Giovanni, Op. cit.
[11] De Giovanni, Op. cit.
[12] Boxich, Contribution to the Morphological, Clinical and Anthropological Study of delinquents.
[13] Deniker, Races et peuples de la terre.
[14] Topinard, Elementi di Antropologia.