490 NOTES. 



latter are finally explicable as the 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 l'Ovaire." Brussels, 1874. 



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

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

 Ei," 1872, p. 152) ; also Gegenbaur (" Grnndriss der vergleichen- 

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

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

 Man" ("Die Eierstocke der Siiugetkiere und des Menscheu/' 

 1863). 



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

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

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

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



198 (ii. 41S). Wilkelm Wundt, "Lectures on the Human and 

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

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

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



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

 forces, cf. Hermann Helmholtz, " Interoperation of Natural 

 Forces " (" Wechselwirkung der Naturkraf te," Part II., 1871). 



200 (ii. 457). " Anthrojoology as Part of Zoology." — " Generelle 

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

 vol. ii. 347. 



