
592 THE LINGERING ADMIRERS OF PHRENOLOGY. 
cles are developed. These parts are devoted to the carrying 
on of obscure functions connected with the sensibility and 
movements of the body strictly comparable with the func- 
tions of the spinal cord, and entirely of a physical descrip- 
tion: the organs of the mental faculties are the developed 
hemisphere vesicles, and these only. The hemisphere vesicles 
rapidly enlarge and extend backwards over and around the 
other parts of the brain, so as to reach to the cerebellum 
behind, come in contact with the whole roof and sides of the 
skull and a large part of its floor, and press one against the 
other in the middle line of the whole length of the skull for 
an average depth of a couple of inches ; and early in embry- 
onic life they are already much the most bulky parts of the 
brain. 
The gray matter which lines the whole length of the cere- 
brospinal cylinder fails to be developed in the hemisphere 
vesicles, except at one part placed at the neck of the vesicle, 
and called by anatomists the corpus striatum, but of which 
we know nothing in respect of function, and can only note 
that it is traversed by the whole mass of fibres joining the 
hemisphere vesicles with the cord and cerebellum. The 
whole of the rest of the hemisphere vesicle, or, as it is 
termed, the cerebral hemisphere, consists of an enormous 
mass of white matter, with a superadded layer of gray 
matter on the outside. The cerebellum has the same peculi- 
arity of having its gray matter on the surface, and it is 
_ curious to note that both the gray matter on the cerebellum 
and that on the cerebrum, while differing one from the other 
in minute structure, differ still more oni the gray matter 
which is found elsewhere, and the function of which is, as 
we have seen, in a general way, well understood. Also the 
cerebellum and cerebral hemispheres resemble each other in 
being thrown into numerous elevations and depressions, in 
. order to expose a larger extent to the vascular membrane on 
their surface, which.sends its minute branches into them. 
s circumstances might plead a little for the doctrine that 

