172 READINGS IN EVOLUTION, GENETICS, AND EUGENICS 



The fascinating biogenetic law of Miiller and Haeckel summed up 

 in the phrase, ^^ ontogeny is a recapitulation of phytogeny, ^^ must not 

 be too heavily leaned on as a support for any speculations as to the 

 phyletic affinities of any species or group of species of organisms. 

 ''Embryology is an ancient manuscript with many of the sheets lost, 

 others displaced, and with spurious passages interpolated by a later 

 hand." 



