anatomical  connexions  of  the  cerebellum  with  the  sensory  ganglia,  throogh
irhich  the  sensations  are  conveyed  that  guide  the  iudiridiiAl  moyementt,
and  with  the  medulla  oblongata,  through  which  the  motor  impulses  are
conveyed  to  the  nerves,  harmonize  well  with  such  a  supposition.  The  pe-
culiar connexion  of  the  cerebellum  with  the  sensory  ganglia  was  supposed
by  Foville  to  indicate  that  it  is  the  actual  seat  of  sensation ;  an  idea  at
once  negatived  by  the  entire  absence  of  the  organ  in  invcrtebrcted  animils.
We  shall  now  proceed  to  inquire  how  far  the  above  doctrine  is  borne  out  by
the  results  of  experiment,  and  how  far  the  discrepancies  pointed  out  by  Mr.
Noble  should  lead  us  to  reject  those  results  as  valueless.  We  would  first
remark,  however,  that  we  must  carefuUy  bear  in  mind  the  difference  be-
tween the  results  of  the  simple  ablation  of  the  organ,  and  the  direct  results
of  the  injury  which  that  ablation  involves.  All  convulsive  movementu  fid!
under  the  latter  category ;  for,  as  will  presently  be  shown,  they  subside  ai
the  shock  and  irritation  pass  off;  whilst  we  are  to  look  in  the  residual
phenomena  for  the  simple  results  of  the  loss  of  the  organ.  IIow  much
may  be  learned  from  the  latter,  after  making  all  necessary  allowance  for
the  former,  will  appear,  we  think,  from  the  following  analysis.
