60 



YERTEBRATA : MAMMALIA. 



Section of the Brain, etc., or principal portion of the cerebro-spinal system of the 



highest Mammal Man. 



a, cerebrum ; 6, cerebellum ; c, spinal cord ; fZ, section of the corpus callosum ; e, 

 optic lobes; /, olfactory nerves; r, eyeball and optic nerve. 



principal portion of the cerebro-spinal system of the high- 

 est mammal Man is seen in Fig. 65, and the anterior 

 portion of the cerebro-spinal system of a Eabbit is seen in 

 Fig. 66. 



The Ganglionic system is composed of a number of 

 small ganglions or masses of nervous matter, united to 

 each other by filaments, and by the same means to the 

 cerebro-spinal system. These ganglions are arranged in 

 the cavity which contains the heart, lungs, and the other 

 internal organs, and in a double row on each side of the 

 spinal column ; and many others are scattered through the 



