82 THE CAXIXE TEETH. 



nerve of the humerus ran through a supra-condyloid 

 fora'men. At this or some earlier period the intestine 

 gave forth a much larger diverticulum or caecum than 

 that now existing. The foot, judging from the con- 

 dition of the great-toe in the fetus, was then prehen- 

 sile, and our early progenitors were no doubt arboreal 

 in their habits, frequenting some warm, forest-clad 

 land. The males were provided with great canine 

 teeth, which served them as formidable weapons."* 



no less astonishing and remarkable than the well known meta- 

 morphoses of the butterfly. * * * An examination of the 

 human embryo in the third or fourth week of its evolution 

 shows it to be altogether different from the fully developed 

 man, and that it exactly corresponds to the undeveloped em- 

 bryo-form presented by tiie ape, the dog, the rabbit, the horse, 

 and other mammals, at the same stage of their ontog'eny (germ 

 history), which may be demonstrated by placing the respective 

 embr}^os side by side. At this stage it is a bean-shaped body of 

 very simple structure, with a tail behind, and two pairs of pad- 

 dles, resembling the fins of fish, and totally dissimilar at the 

 sides to the limbs of man and other mammals. Nearly the 

 whole of the front half of the body consists of a shapeless head, 

 without a face, on the sides of which are seen gill-fissures and 

 gill-arches, as in fishes. * * * The human embryo passes 

 through a stage in which it possesses no head, no brain, no 

 skull ; in which the trunk is still entirely simple and undivided 

 into head, neck, breast, and abdomen, and in which there is no 

 trace of arms or legs." — Ernst Heinrich Haeckel, ''The Rcolution 

 of Man," Vol. I, pp. 3, IS, 253. 



* Mr. Darwin continues: " At a much earlier time the uterus 

 was double ; the excreta were voided through a cloaca, and the 

 eye was protected by a third eyelid or nictitating membrane. 

 At a still earlier period the progenitors of man must have been 

 aquatic in their habits, for mor|>hology plainly tells us that our 

 lungs consist of a modified swim-bladder, which once served as 

 a float. The clefts on the neck in the embryo of man show 

 where the branchiae once existed," «Sic.,&c. 



