Stcloer  opens  his  study  of  d^hct-  l)v  some  tesU  on  the  function  of  the
fins  and  call.  Tlie  tHil  ia  preiiniinently  the  organ  of  lopomodon,  whereits
the  flos  arc  used  to  keep  ihc  auhniil  at  a  givea  level  hi  the  water,  to
steer,  to  stop  and  to  move  l>ackwan*i;;  with  maintenance  of  eQiiilihrium
(hey  havo  nothing  to  do.  S<j*inUwi  wphnhta  (v.  Stebold)  was  the  flah
useil  for  theae  experiments.  In  removino;  different  part«  of  the  brain,
the  ImprovemeolA  in  technique  employed  were  artltlfial  rcapiration.  to
keep  the  tliih  quiet  during  the  operation,  and  a  u»^fnl  method  of  closing
the  wound  by  h  gellatitic  (.-.ip,  so  that  healiDK  is  fai-ilJlated  and  water

Srevwnted  from  ent(>rlQg  the  ctvity  of  the  pbnll.  The  removal  of  the
orel)niiu  from  thw  Imuy  Ilsh  (S-iuaHus)  Is  followed  by  no  ios»  in
locomotion.  Further,  the  movements  of  the  specimen*  are  not  to  be
dUtinguished  frum  the  normal,  acid  are  voluntarv.  When  food  is  put
in  the  tank  Ic  is  seized  by  fiuch  a  fl&h  with  unliesitating  exactness,  and
H  worm  is  diotinguliihed  from  a  piece  of  string  before  it  is  taken.  Fish
thus  operated  play  together.  \^  e  have  here  the  very  remarkable  case
of  the  seat  of  v'olnutary  activity  elsewhere  than  in  the  forebrain.
Stelner  argues  thHt  the  lorehrain'nrce  possessed  these  functions,  but
becoming  degenerate  (as  U  certainly  Is),  parted  with  them  to  the  more
caudal  divisions.  In  this  flsh  an  ioterbrain  Is  not  available  for  separate
Btody.
