38 



ANATOMY OF THE CENTRAL NERVOUS SYSTEM. 



Fig. 14. — Schema of the peripheral and central nervous system. The rela- 

 tions shown do not e.xist in any particular animal, but represent rather the 

 principles determined from a. comparative study of many animals, and are in- 

 troduced for the elucidation of the text. Note the motor and sensory nerves, 

 peripherally and centrally located centers, and the connections represented. A, 

 B, C, and D indicate that the tract is one of I, II, III, or IV order, respectively. 



