284 



NERVE-TISSUE. 



which freely bifurcates and sends its branches into the outer gray 

 layer. From the inner pole arises an offshoot, which, without 

 ramifications, traverses the granular layer and runs into the 



FIG. 118. ANTERIOR LOBE OF THE BRAIN OF A TREE-FROG. 

 SAGITTAL SECTION. 



/, investing sheath of connective tissue; R, rows of nuclei; V, ventricle, with endothel- 

 ial investment ; N, bundle of medullated nerve-fibers. Magnified 50 diameters. 



white substance. The inner so-called granular layer is composed 

 of heaps of small globular bodies, mostly of a high degree of 



