Chap, ii.] OF CELLS AND OF NERVOUS FIBRES. 



385 



Fio. 71. 



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

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

 /', elongated marrow ; /, spinal marrow ; 1^ olfactory nerve ; 2, optic nerve ; 3, oculO' 

 motory nerve ; 4, pathetic nerve ; 6, trigemmous nerve : 6, abductor nerve of the eye ; 

 7, facial nerve and auditive nerve ; 9, glosso-pharyngial n^iTe ; 10, pneumogastric of 

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

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

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

 nerves forming what is called the horse's tail (Cauila egvma); X impair terminal nerve 

 of the spinal marrow ; k, sciatic nerve. 



C C 



