﻿various 
  South- 
  American 
  Mammals. 
  351 
  

  

  always 
  been 
  involved 
  in 
  extreme 
  confusion, 
  partly, 
  no 
  doubt, 
  

   because 
  of 
  the 
  doubtful 
  standing 
  of 
  the 
  groups 
  tiiemselves, 
  

   but 
  more 
  because 
  of 
  the 
  constantly 
  incorrect 
  determination 
  of 
  

   the 
  species 
  on 
  which 
  the 
  names 
  are 
  founded. 
  

  

  The 
  chief 
  of 
  these 
  causes 
  of 
  error 
  lies 
  at 
  the 
  door 
  of 
  

   " 
  Cams 
  azarce, 
  Wied/^ 
  a 
  name 
  wiiich, 
  though 
  made 
  in 
  

   honour 
  of 
  Azara, 
  with 
  mention 
  of 
  tiie 
  latter's 
  Agouarachay, 
  

   was 
  clearly 
  based 
  on 
  a 
  member 
  of 
  the 
  Crabeater 
  group. 
  Jt 
  

   has, 
  however, 
  been 
  commonly 
  used 
  for 
  the 
  Agouarachay 
  of 
  

   Paraguay, 
  and 
  from 
  this 
  error 
  much 
  of 
  the 
  confusion 
  has 
  

   arisen. 
  

  

  Dr. 
  J. 
  A. 
  Allen, 
  in 
  his 
  ' 
  Mammalia 
  of 
  Southern 
  Pata- 
  

   gonia 
  ^ 
  *, 
  has 
  made 
  a 
  valiant 
  eflfbrt 
  to 
  clear 
  up 
  the 
  confusion, 
  

   but, 
  owing 
  to 
  his 
  not 
  appreciating 
  the 
  various 
  misdetermina- 
  

   tions 
  of 
  species 
  that 
  have 
  taken 
  place, 
  his 
  results 
  do 
  not 
  seem 
  

   to 
  be 
  completely 
  acceptable. 
  I 
  propose, 
  however, 
  to 
  accept 
  

   as 
  far 
  as 
  possible 
  his 
  selection 
  of 
  the 
  genotypes 
  wherever 
  

   these 
  are 
  doubtful. 
  

  

  The 
  names 
  Speothos 
  (syn. 
  Icticyon) 
  for 
  venaticus 
  and 
  

   Chrysocyon 
  for 
  juhatus 
  are 
  clearly 
  settled, 
  and 
  do 
  not 
  need 
  

   further 
  reference. 
  

  

  Dusicyon, 
  Ham. 
  Smith 
  (1839), 
  contained 
  four 
  species, 
  of 
  

   whicii, 
  following 
  Allen, 
  we 
  may 
  accept 
  Cam's 
  a?itarcticus 
  as 
  

   the 
  genoty})e. 
  On 
  this 
  basis 
  it 
  forms 
  a 
  group 
  distinct 
  from 
  

   anything 
  on 
  the 
  S.-American 
  continent, 
  and 
  peculiar 
  to 
  the 
  

   Falkland 
  Islands. 
  Two 
  species, 
  both 
  now 
  extinct, 
  from 
  the 
  

   West 
  and 
  East 
  Falklands 
  respectively, 
  are 
  contained 
  iu 
  it, 
  

   the 
  second 
  one 
  being 
  described 
  below. 
  

  

  The 
  next 
  name 
  is 
  Cerdocyon, 
  Ham. 
  Smith. 
  From 
  the 
  

   four 
  species 
  included, 
  Dr. 
  Allen 
  selects 
  " 
  Cants 
  azarw, 
  Wied, 
  

   and 
  Vulpes 
  mageUanicus, 
  Gray," 
  as 
  being 
  its 
  basis 
  and 
  being- 
  

   congeneric. 
  But 
  this 
  is 
  not 
  the 
  case, 
  for 
  Canis 
  azarce, 
  Wied, 
  

   is 
  a 
  Crabeater, 
  while 
  mayellanicus 
  is 
  one 
  of 
  the 
  Agouarachay 
  

   group. 
  I 
  shall 
  return 
  to 
  this 
  name 
  below. 
  

  

  The 
  next 
  is 
  Lycalopex, 
  Burm. 
  (1854), 
  and 
  for 
  this 
  

   Dr. 
  Allen 
  selects 
  vetulus 
  as 
  genotype, 
  but, 
  on 
  the 
  ground 
  that 
  

   vetulus, 
  Burmeister, 
  is 
  not 
  tlie 
  same 
  as 
  vetulus, 
  Lund, 
  he 
  

   renames 
  this 
  group 
  Eutwthocyon, 
  Matthew's 
  Nothocyon 
  having 
  

   been 
  accidentally 
  rendered 
  unavailable 
  for 
  it, 
  for 
  reasons 
  

   whicii 
  he 
  explains. 
  

  

  But 
  whether 
  or 
  not 
  Burmeister 
  and 
  Lund's 
  vetulus 
  are 
  

   specijically 
  different 
  from 
  each 
  other 
  (which, 
  after 
  seeing 
  

  

  * 
  P. 
  151 
  et 
  seqq. 
  (1905). 
  

  

  