NOTES. 48I 



124 (i. 464). The Plijlogenetic Importance of the Amphi- 

 oxus cannot be too highly insisted on. Without knowledge of 

 its Anatomy and Ontogeny, the origin of Vertebrates would be 

 entirely dubious, and their descent from Worms would appear 

 incredible. 



125 (i. 467). The Ontogenetic Cell-pedigree, as it is repre- 

 sented, with reference to the Amphioxus, in Table XI., probably 

 holds good, in its most important features, for all Vertebrates, 

 and, therefore, also for Man. For, more than any other form, 

 the Amphioxus by strict Heredity has accurately retained its 

 Palingenesis. This histogenetic cell-pedigree is apparently well 

 established as regards most and the chief features ; on the other 

 hand, it yet appears doubtful with regard to the origin of the 

 primitive kidneys, the testes, and ovaries. 



126 (ii. 4). Milne-Edwards, "Lecons sur la Physiologie 

 Comparee," vol. ix. 



127 (ii. 6). Eternity of Organic Life. According to the 

 monistic view, organic life is a further form of evolution of the 

 inorganic word-processes, and had a beginning in time on our 

 planet. In opposition to this, A. Fechner, among others, in his 

 " Thoughts on the Creation and Evolution of Organisms," has 

 stated certain opposed " kosmorganic pb^ntasys " which appear 

 entirely irreconcilable with the ontogenetic facts given here. 



128 (ii. 18). Bernhard Cotta (" Geologie der Gegenwart," 

 1866; 4th edition, 1874) and Karl Zittel ("Aus der Urzeit; " 

 Miinchen, 1875, 2nd edition) have made some excellent remarks 

 on the duration and the whole course of the organic history of 

 the world. 



129 (ii. 21). August Schleicher, "The Darwinian Theory 

 and Philology" (' : Die Darwin'sche Theorie und die Sprach- 

 wissenschaft." Weimar, 1863. 2nd edition, 1873). 



130 (ii. 25). At first sight, most polyphyletic hypotheses 

 appear more simple and easy than do monophyletic, but the 

 former always present more difficulties the more they are 

 considered. 



131 (ii. 25). Those physiologists who desire an experi- 



