EVOLUTION, HEREDITY, EUGENICS 



529 



monkeys and marmosets) which gave but slight reactions with 

 antihuman serum, whilst the blood of Lemuroidea gave no indication 

 of blood relationship." 



Evidence from Embryology. — All animals, even man, begin as a 

 single cell, and develop in a parallel manner for a short time. We 

 have considerable evidence to support the Recapitulation Theory 



Turtle N. 



C?o/eus 



F'rom inside 



Eog/e 



f^t-om ins'ide 



Young 

 Duoonq ^ 



Hor^e N.j.^ 



^- Otori'a 

 )■ SeQ Lion 



Ape 



P/ica, 

 Semilunari-s 



Man .Man 



Fig. 266. Illustrations of the nictitating membrane in the various animals. (From 

 Romanes, Darwin and After Darwin. Courtesy of Open Court Pub. Co.) 



