CHAI>. ii.] OF CELLS AND OF NERVOUS FIBRES. 



385 



i 

 FIG. 71. 



Central nervous system of man seen from the ventral face : a, brain ; fe, anterior lobe of the 

 brain ; c, median lobe ; d, posterior lobe nearly covered by the cerebellum ; e, cerebellum ; 

 /', elongated marrow ; /, spinal marrow ; 1, olfactory nerve ; 2, optic nerve ; 3, oculo- 

 motory nerve ; 4, pathetic nerve ; 5, trigeminous nerve ; 6, abductor nerve of the eye ; 

 7, facial nerve and auditive nerve ; 9, glosso-pharyngial nerve ; 10, pneuinogastric or 

 vagus nerve; 11, accessory nerve and hypoglossal nerve; 13 to 16, the first four cervical 

 nerves ; g. nerves of the neck forming the brachial plexus ; 25, dorsal nerves ; 33, lumbar 

 nerves ; h, lumbar and sciatic nerves uniting to form the lumbar plexus ; i, the last 

 nerves forming what is called the horse's tail (Cauda equvna) ; j, impair terminal nerve 

 of the spinal marrow ; Jk, sciatic nerve. 



C C 



