90 



MAN AND THE LOWER ANIMALS. 



ii 



mediately below him in the scale: — without a 

 doubt, in these respects, he is far nearer the Apes, 

 than the Apes are to the Dog. 



The Human ovum is about yj-g-th of an inch 

 in diameter, and might be described in the same 

 terms as that of the Dog, so that I need only refer 



Fig. 15. — A. Human ovum (after Kolliker). a. ger- 

 minal vesicle. &. germinal spot. B. A very early condi- 

 tion of Man, with yelk-sac, allantois and amnion (origi- 

 nal). C. A more advanced stage (after Kolliker), com- 

 pare Fig. 14, C. 



to the figure illustrative (15 A) of its structure. 

 It leaves the organ in which it is formed in a 

 similar fashion and enters the organic chamber 

 prepared for its reception in the same way, the 

 conditions of its development being in all respects 

 the same. It has not yet been possible (and only 

 by some rare chance can it ever be possible) to 



