PIIYLOGENY. ., : , 



that particular organisms have arism by the gradual m 

 cation of their predecessors, which U fur -.y fottil 



remains. That evidence is daily increasing in amount ami in 

 weight; and it is to be hoped that the comparison <>f dp- 

 actual pedigree of these organisms with tin- phriiomn. 

 their development may furnish some criterion by whirl. 

 validity of phylogenetic conclusions, deduced from the fact* 

 of embryology alone, may be satisfactorily tested. 



