PHYSIOLOGY OF THE NERVOUS SYSTEM. 



771 



-which vary in accordance with the character of the nerves with which 

 they are in communication. The nerves or nerve-fibres are simply 



Fig. 328.— Brain and Nervous System of I»fferent Animals, Natural 

 Size. (Thanhoffer.) 



1, brain of ape : 2. domestic cat ; 3, squirrel : 4, water-rat : -1. mole ; (i. fox ; 7, quail ; 8, nervous sys- 

 tem of homed beetle ; 9. perch ; fa, suprapharyngeal ganglion : lid, abdominal ganglion ; wr. end ganglion ; 

 i, (esophagus: e. nervous cord connecting the pharyngeal ganglion: Crb, cerebrum; rbl cerebellum; 

 mobl, medulla oblongata; olf, olfactory tract : to, optic lobes; Ch, hemispherical lobes: I-IA (in ing. y;, 

 cerebrat nerves ; vd, vagus ganglion ; br. branchial nerves ; 10, nervous system of the snail ; Jy, supra- 

 pharyngeal ganglion ; ag, infrapharyngeal ganglion. 



