181) 



THE GENESIS OF SPECIES. 



[ClIAP, 



been termed by ^Nfr. Ray Lankester "liomogeny ;"^ and 

 (2) a relationshii) induced, not derived — ^ucli as exists 

 between parts closely similar in relative position, but with 



'»*>t»^ 



isJtiS!^^ 



PART OF THE SKELETON OF THE LOBSTER. 



no genetic afHnity, or only a remote one, as tlic Lomulo- 

 gical relation lietween the chambers of the heart of a bat 

 and those of a bird, or the similar teeth of the thylacine 



^ See Auu. auJ Mag. of Xut. Hist., July 1870. 



