OF LIVING FORMS; OR, MORPHOLOGY. 91 



grow where a free space is afforded for them, at the 

 points of separation between the lobes which, at this 

 early period, constitute the brain. The eye " buds 

 out" between the first and second lobes, the ear 



Tlie convolutions of the brain. 



between the second and third. They are at first 

 hollow protrusions, merely, of the substance of the 

 brain. The attached portion, or " pedicle," lengthens 



