﻿Dr. 
  D. 
  Ferrier 
  on 
  the 
  Brain 
  of 
  Monkeys. 
  421 
  

  

  quently 
  exhibited 
  by 
  monkeys 
  under 
  the 
  influence 
  of 
  fear 
  or 
  anger, 
  viz. 
  

   the 
  exposure 
  of 
  the 
  canine 
  teeth. 
  

  

  Circles 
  (^9J 
  and 
  Q^J, 
  fig- 
  2, 
  corresponding 
  in 
  situation 
  to 
  the 
  

  

  lower 
  part 
  of 
  the 
  ascending 
  frontal 
  convolution, 
  or 
  posterior 
  part 
  of 
  the 
  

   inferior 
  frontal 
  convolution, 
  above 
  the 
  lower 
  end 
  of 
  the 
  fissure 
  of 
  Sylvius 
  

   (Broca's 
  convolution). 
  

  

  L 
  (^)- 
  The 
  lips 
  pout, 
  mouth 
  gradually 
  opens, 
  and 
  the 
  tongue 
  is 
  

   protruded. 
  

  

  (lo)- 
  Action 
  similar 
  as 
  to 
  the 
  mouth, 
  but 
  the 
  tongue 
  is 
  

  

  retracted. 
  Longer 
  stimulation 
  caused 
  movements 
  of 
  the 
  mouth 
  

   and 
  tongue, 
  as 
  in 
  mastication. 
  

  

  II. 
  (j^)- 
  Mouth 
  opened 
  and 
  tongue 
  protruded. 
  

  

  (lo)- 
  Tongue 
  retracted. 
  

  

  Movements 
  of 
  mastication 
  made 
  by 
  continued 
  stimulation. 
  

  

  III. 
  Same 
  results 
  as 
  in 
  I. 
  and 
  II. 
  

  

  IV. 
  Not 
  explored. 
  

  

  V. 
  ^9^, 
  as 
  in 
  former 
  cases, 
  causes 
  opening 
  of 
  the 
  mouth 
  and 
  protru- 
  

  

  sion 
  of 
  the 
  tongue. 
  

  

  ^To) 
  causes 
  retraction 
  of 
  the 
  tongue. 
  

  

  Movements 
  of 
  mastication 
  also 
  caused 
  on 
  longer 
  stimulation. 
  

  

  VI. 
  Not 
  explored. 
  

  

  VII. 
  Mouth 
  opened 
  and 
  tongue 
  protruded, 
  

  

  (^Q)' 
  Same 
  result, 
  but 
  tongue 
  apparently 
  retracted. 
  

  

  VIII. 
  (^)- 
  Opening 
  of 
  the 
  mouth 
  and 
  protrusion 
  of 
  the 
  tongue. 
  

  

  (^LcT). 
  Same 
  result, 
  with 
  retraction 
  of 
  the 
  tongue, 
  followed 
  on 
  

  

  continuous 
  stimulation 
  with 
  opening 
  and 
  shutting 
  of 
  the 
  mouth, 
  

   and 
  alternate 
  protrusion 
  and 
  retraction 
  of 
  the 
  tongue. 
  

  

  IX. 
  Similar 
  results 
  to 
  VIII. 
  

  

  X. 
  Not 
  explored. 
  

  

  XI. 
  Results 
  of 
  VIII. 
  confirmed. 
  

  

  XII. 
  Not 
  explored. 
  

  

  XIII. 
  Movements 
  of 
  the 
  mouth 
  and 
  tongue, 
  but 
  not 
  of 
  any 
  very 
  definite 
  

   character, 
  the 
  animal 
  being 
  in 
  a 
  state 
  of 
  exhaustion, 
  and 
  the 
  

   excitability 
  of 
  the 
  brain 
  very 
  weak. 
  

  

  