4/3 NOTES. 



(both heterotopic and heterochronic), just as in the former. 

 (Cf. note 108.) 



105 (i. 374). The nose of Nosed-apes is much more different 

 from that of other Apes than from that of Man. Moreover, 

 even the extreme variety and variability in the external form 

 of the human nose shows how small is the morphological value 

 of this organ, so important to the physiognomy. 



106 (i. 383). The bladder-like form of the hnman Allantois. 

 Cf. W. Krause. " On the Allantois in Man " (" Ueber die Allan- 

 tois des Menschen." "Archiv fur Anat. n. Physiol.," 1875, p. 215, 

 Plate VI.). 



107 (i. 400). The navel-cord (funiculus umlilicalis), like 

 the placenta, is an organ shared by Man exclusively with Pla- 

 cental Animals. Cf. Chap. XIX. pp. 155-168, and Figs. 200, 201. 

 On the more minute structure of this organ, and on the special 

 features of the embryonic blood-circulation, cf. Kolliker, " His- 

 tory of the Evolution of Man." 2nd edition, 1876, pp. 319-363. 



108 (i. 401). The Kenogeny of Man. In pointing out the 

 phylogenetic significance of the separate incidents and periods of 

 human germ-history, and in explaining them by reference to cor- 

 responding processes and stages in the tribal history of our animal 

 ancestors, we must always bear in mind that in Man, as in all 

 higher animals, the original palingenetic cause of germination 

 has undergone much kenogenetic modification in consequence of 

 many adaptations to the very various conditions of embryonic 

 life, that it has thus been much violated and contracted. The 

 higher the organism develops, the more are especially these 

 earliest stages of evolution abbreviated. 



109 (i. 404). The sections of hnman germ-history, of which 

 only four larger and ten smaller are mentioned here in reference 

 to their phylogenetic significance, allow of much more division 

 if their comparative Ontogeny is minutely examined. This 

 phylogenetic significance may also be very well explained with 

 fitting reference to kenogenetic displacements in place and time 

 (vol. i. p. 13). 



110 (i. 405). Figures of human embryos in all stages of 



