G6 AMPHIBIA. 



FIG. VIII. 



(THE SAME.) 



IN this figure are seen the commissures of the optic nerves, in which the tracts 

 join ; the nerves do not cross by one's being super-imposed. 



1. The cut portion of the crus of the brain from which the striated body has been 

 separated. 



FIG. IX. 



(THE SAME.) 



THE spinal cord is continued quite to the end of the tail, and has cineritious 

 matter within it, similar to that in mammalia. It gives off anterior and posterior 

 bundles of nerves ; but their roots are very close to each other, and there is a ganglion 

 attached to the posterior. At the 'anterior point, the anterior bundle becomes united 

 with it : each anterior bundle is rather larger than the posterior. 



