niimber  of  nerve  eiidings,  tliat  reniinded  me  of  tliose  described  by  Hoeke 
as  “accessorj”.  Tbis  state  of  affairs  compelled  me,  before  continuing 
the  segmeiital  investigations  mentioned  above,  fo  attempt  to  answei- 
the  qiiestion  : “Are  the  cross-striated  miisele  fibres  of  tlie  extremities 
also  iniiervated  sjmpathetieally  ?”,  and  in  addition,  in  case  the 
question  could  l)e  answered  positivelj,  ,to  studj  in  somewhat  more 
detail  the  terminal  organs  of  these  nerves  in  the  exlremity-musen- 
lature. 
There  were  really  two  ways  in  which  1 could  set  abont  answering 
this  question,  I could  either  bring  all  the  spinal  nerves  in  the 
extremities  into  degeneration,  taking  cai-e  that  all  the  sym|)athetie 
nerves  to  the  extremities  rernained  intact,  or  else  I could  bring  the 
sympathetic  nerves  into  degeneration  while  the  spinal  ones  wei'e 
left  intact.  I chose  both  methods,  so  that  I might  possibly  arrivé  at 
results  that  agi'eed  with  each  other  and  that  were  therefore  so  much 
more  certain. 
In  order  to  bring  into  degeneration  the  sympathetic  nerves  of  the 
extremity  the  ganglion  stellatum  of  one  side  was  exstir|)ated  in  two 
cats.  The  cats  were  kept  alive  for  a few  days  (four  and  six  respec- 
tivelj')  after  the  operation.  In  sections  of  /?-impregnated  extremity- 
muscles  from  the  animal  in  wliich  degeneration  had  proceded  farthest 
I was  SLiccessful  in  showing  the  remains  of  degenerated  nerves  that 
were  without  medullai'y  sheaths.  1 shali  give  a more  detailed  account 
of  this  pai't  of  the  investigation  in  a more  complete  description.  I 
shall  enter  here  into  rather  more  detail  about  the  other  part,  i.e. 
the  bringing  into  degeneration  of  the  spinal  nerves,  taking  care  that 
the  sympathetic  ones  rernained  intact. 
I ent  off  the  last  four  cervical  and  the  tirst  two  thoracal  nerves 
in  the  foramina  intervertebralia  of  several  cats.  The  sections  were 
made  bet  ween  the  ganglion  spinale  and  the  place  where  the  ramos 
coramunicans  albus  goes  off.  The  wounds  were  sutured  and  began 
to  heal  per  primam  intent.  The  animals  were  killed  after  different 
periods  of  time  varying  from  five  to  ten  days  after  the  ojieration. 
The  animal  from  which  were  taken  the  [ireparations,  on  which  the 
following  description  is  based,  was  killed  five  days  aflei' the  operation, 
On  account  of  the  operations  that  had  been  carried  out  it  could 
thus  be  assumed  that  after  a sufficiënt  length  of  time  degeneration 
would  occiir  — peripherically  of  the  place  of  the  section  — in 
the  spinal  nerve  fibres  of  the  segmental  nerves  that  had  been  cut 
off  and  also  in  their  pre-ganglionar  sympalhetic  nerves.  On  the  other 
hand  there  was  reason  to  expect  that  the  post-ganglionar  sympathetic 
nerves  were  kept  intact.  The  shortest  of  the  periods  of  degeneration 
