490 NOTEa 



latter are finally explicable as tlie results of the attraction and 

 rejection of homogeneous and heterogeneous particles. 



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

 nelle du Testicule et de I'O^aire." Brussels, 1874. 



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

 Vertebrates, of. Waldeyer, "Ovary and Egg" ("Eierstock und 

 Ei," 1872, p. 152) ; also Gregenbaur (" Gmndriss der verglelchen- 

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

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

 Man" ("Die Eierstocke der Saugethiere und des Menschen," 

 1863). 



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

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

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

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



198 (ii. 448). Wilhelm Wundt, "Lectures on the Human and 

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

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

 chology" ("Grundziige der Physiologlshen Psychologic," 1874). 



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

 forces, cf. Hermann Helmholtz, " lateroperation of Natural 

 Forces " (" Wechselwirkung der N"aturkrafte," Part II., 1871). 



200 (Ii. 457). "Anthropology as Part of Zoology." — " Genercllo 

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

 vol. ii. 347. 



