14 THE DESCENT OF MAN. Part I. 



differs from woman in size, bodily strength, hairyness, 

 &c, as well as in mind, in the same manner as do the 

 two sexes of many mammals. It is, in short, scarcely 

 possible to exaggerate the close correspondence in gene- 

 ral structure, in the minute structure of the tissues, in 

 chemical composition and in constitution, between man 

 and the higher animals, especially the anthropomor- 

 phous apes. 



Embryonic Development. — Man is developed from an 

 ovule, about the 125th of an inch in diameter, which 

 differs in no respect from the ovules of other animals. 

 The embryo itself at a very early period can hardly be 

 distinguished from that of other members of the verte- 

 brate kingdom. At this period the arteries run in arch- 

 like branches, as if to carry the blood to branchiae 

 which are not present in the higher vertebrata, though 

 the slits on the sides of the neck still remain (f, g, fig. 1), 

 marking their former position. At a somewhat later 

 period, when the extremities are developed, "the feet of 

 " lizards and mammals," as the illustrious Von Baer 

 remarks, " the wings and feet of birds, no less than the 

 " hands and feet of man, all arise from the same funda- 

 " mental form." It is, says Prof. Huxley, 10 " quite in 

 " the later stages of development that the young human 

 " being presents marked differences from the young 

 " ape, while the latter departs as much from the dog 

 " in its developments, as the man does. Startling as 

 •* this last assertion may appear to be, it is demonstrably 

 " true." 



As some of my readers may never nave seen a draw- 

 ing of an embryo, I have given one of man and another 

 of a dog, at about the same early stage of development, 



10 ' Man's Place in Nature,' 1SC3, p. 67. 



