2o6 The Descent of Man. Paet T. 



But it is important lo rimark that, whether Gratiolet was right or 

 wrong In his hypothesis reap; cting the relative order of appeaiance of 

 the temporal and frontal suk'i, the fact remains ; that, before either 

 temporal or frontal sulci, appear, the foetal brain of maa presents 

 chai'iicters which are found only in the lowest group of the Primatet 

 (leaving out the Lemurs) ; and that this is exactly what we should 

 expect to be the ease, if man has resulted from the gradual modifica- 

 tion of the same form as that from 'vhich the other Frimatee have 



