490 NOTES. 



latter are finally explicable as the results of tlie attraction and 

 rejection of homogeueous and heterogeneous particles. 



195 (ii. 397). Eduard vau Beneden, "De la Distinction origi- 

 nelle du Testicule et de I'Ovaire." Brussels, 1874. 



196 (ii. 399). On the Original Hermaphrodite Structure of 

 Vertebrates, cf. Waldeyer, " Ovaiy and Egg " (" Eierstock und 

 Ei," 1872, p. 152) ; also G-egenbaur (" Grundriss der vergleichen- 

 den Anatomie," 1874, p. 615). On the origin of the eggs from the 

 ovary-epithelium, cf. Pfliiger, " On the Ovaries of Mammals a,nd 

 Man" ("Die Eierstooke der Siiugethiere und des Menschen," 

 1863). 



197 (ii. 423). On the special germ-history of the urinary and 

 sexual organs, cf. KoUiker, " History of the Evolution of Man." 

 On the homologies of these organs, see Gegenbaur (" Grundriss 

 der vergleichenden Anatomie," 1874, pp. 610-628). 



198 (ii. 443). Wilhelm Wundt, "Lectures on the Human and 

 Animal Mind" (" Vorlesungen iiber die Menschen- und Thier- 

 seele." 1863). W. Wundt, "OutHnes of Physiological Psy- 

 chology" ("Grundziige der Physiologishen Psyohologie," 1874). 



199 (ii. 457). On Active (actual) and Latent (preteritial) 

 forces, cf. Hermann Helmholtz, " Interoperation of Natural 

 Forces " (" Wechselwirkung- der Naturkrafte," Part II., 1871). 



200 (ii. 457). "Anthropology as Part of Zoology." — " Generellc 

 Morphologic," vol. ii. p. 432. "History of Creation," vol. i. 7; 

 vol. ii. 347. 



