194 



COMPARATIVE ANATOMY 



FIG. 



145. THE ENTIRE NERVOUS SYSTEM OF THE FROG. 

 From the ventral side. 



(After A. Ecker.) 



F, facial nerve ; G, ganglion of the vagus ; He, cerebral hemispheres ; / to X, first 

 to tenth cerebral nerves ; Lop, optic lobes ; M, spinal cord ; M 1 to 3/10, 

 spinal nerves, which are connected at SM by branches (rami communicantes) 

 with the ganglia (Si to $10) of the sympathetic (S) ; N, nasal sac ; Ni, sciatic 

 nerve ; No, femoral nerve ; o, eye ; Fa 'to Ve, the different branches of the tri- 

 geminal ; Vy, Gasserian ganglion ; Vs, connection of the sympathetic with the 

 Gasserian ganglion ; XI to X4, the different branches of the vagus. Some of the 

 fibres of the sympathetic should be shown accompany ing the vagus peripherally. 



