﻿418 
  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM 
  vol.98 
  

  

  geqffroyi 
  Humboldt, 
  a 
  Callithrix, 
  simply 
  because 
  Humboldt's 
  geofroyi 
  

   had 
  been 
  transferred 
  to 
  the 
  genus 
  Hapale 
  Illiger 
  by 
  Kuhl 
  (Beitrage 
  

   ZooL, 
  Abth. 
  1, 
  p. 
  47, 
  1820). 
  As 
  in 
  the 
  case 
  of 
  Cebus 
  leucocephalus 
  

   Gray 
  (c/., 
  p. 
  344), 
  such 
  application 
  of 
  the 
  Rules 
  regarding 
  primary 
  

   homonyms 
  to 
  secondarily 
  created 
  homonyms 
  is 
  rejected. 
  Pending 
  

   clarification 
  by 
  the 
  International 
  Commission 
  on 
  Zoological 
  Nomen- 
  

   clature, 
  a 
  "secondary 
  homonym" 
  is 
  recognized 
  here 
  as 
  equivalent 
  to 
  

   a 
  true 
  homonym 
  only 
  for 
  the 
  time 
  it 
  remains 
  in 
  the 
  genus 
  that 
  auto- 
  

   matically 
  fixes 
  its 
  status 
  as 
  such. 
  Hapale 
  geqffroyi 
  Pucheran 
  is 
  

   patently 
  no 
  primary 
  homonym 
  of 
  Simia 
  geoffroyi 
  Humboldt. 
  That 
  

   Pucheran 
  erroneously 
  assigned 
  his 
  geqffroyi 
  to 
  the 
  invalidated 
  genus 
  

   Hapale 
  does 
  not 
  alter 
  the 
  fact 
  that 
  his 
  and 
  Humboldt's 
  geoffroyi 
  are 
  

   not 
  and 
  never 
  were 
  simultaneously 
  congeneric 
  and, 
  therefore, 
  are 
  not 
  

   and 
  never 
  were 
  secondarily 
  homonymous. 
  Unfortunately, 
  the 
  abused 
  

   concept, 
  not 
  a 
  rule, 
  "once 
  a 
  homonym 
  always 
  a 
  homonym" 
  is 
  subject 
  

   to 
  such 
  interpretation 
  that 
  all 
  technical 
  names 
  can 
  lose 
  stability 
  by 
  

   any 
  manipulation 
  of 
  scientific 
  terminology. 
  Thus, 
  present 
  Rules 
  do 
  

   not 
  prevent 
  an 
  author 
  from 
  referring 
  all 
  species 
  of 
  Primates 
  to 
  one 
  

   genus 
  and 
  renaming 
  all 
  "secondary 
  homonyms" 
  thus 
  created. 
  

  

  Marikina 
  geoffroyi, 
  along 
  with 
  all 
  other 
  Colombian 
  species 
  of 
  mar- 
  

   mosets, 
  is 
  known 
  locally 
  by 
  the 
  name 
  titi. 
  Allen 
  and 
  Barbour 
  ob- 
  

   served 
  that 
  in 
  Panamd 
  M. 
  geoffroyi 
  is 
  "called 
  'Titi' 
  by 
  Spanish 
  

   speakers 
  and 
  'Bichichi' 
  by 
  Indians." 
  This 
  last 
  name 
  is 
  applied 
  also 
  

   to 
  Saimiri 
  sciureus 
  by 
  the 
  Indians 
  of 
  Maipures, 
  Rio 
  Orinoco 
  (Jlde 
  

   Humboldt, 
  Recueil, 
  p. 
  333, 
  who 
  spells 
  the 
  name 
  in 
  French 
  phonetic, 
  

   " 
  Bitschetschi") 
  . 
  

  

  Specimens 
  examined. 
  — 
  Thirty-one, 
  PanamX: 
  La 
  Chorrera, 
  1 
  

   (U.S.N.M.); 
  Agua 
  Blanca, 
  Canal 
  Zone, 
  1 
  (U.S.N.M.); 
  Alajuela, 
  

   Canal 
  Zone, 
  3 
  (U.S.N.M.); 
  Las 
  Cascades, 
  Canal 
  Zone, 
  1 
  (U.S.N.M.); 
  

   Rio 
  Indio, 
  near 
  Gatun, 
  Canal 
  Zone, 
  8 
  (U.S.N.M.); 
  Cana, 
  Panama, 
  2 
  

   (U.S.N. 
  M. 
  ) 
  ; 
  Chepo, 
  Panamd, 
  1 
  (U.S.N.M.); 
  no 
  precise 
  locahty, 
  5 
  

   (M.N.H.N., 
  type 
  of 
  geoffroyi 
  Pucheran; 
  TT.S.N.M., 
  4). 
  Colombia: 
  

   Sautata, 
  Rio 
  Atrato, 
  Clioc6, 
  7 
  (CM.); 
  Rio 
  Salaqui, 
  Choc6, 
  1 
  (A.M. 
  

   N.H.);Baudo, 
  Choc6, 
  1 
  (A.M.N.H.). 
  

  

  Subgenus 
  Marikina 
  Lesson: 
  True 
  Bare-faced 
  Tamarins 
  

  

  Marikina 
  Lesson, 
  Species 
  des 
  mammif^res, 
  bimanes 
  et 
  quadrumanes 
  suivi 
  d'un 
  

   m^moire 
  sur 
  les 
  Oryct^ropes, 
  p. 
  199, 
  1840 
  (listed 
  under 
  synonymy 
  of 
  (Edipus 
  

   titi 
  Lesson 
  [=^Simia 
  oedipus 
  Linnaeus, 
  see 
  under 
  Oedipomidas 
  above] 
  in 
  an 
  

   erroneous 
  combination 
  with 
  [Midas] 
  bicolor 
  Spix 
  and 
  the 
  bibliographic 
  ref- 
  

   erences 
  thereto; 
  genotype, 
  Marikina 
  bicolor, 
  Lesson 
  [==Midas 
  bicolor 
  Spix]. 
  — 
  

   Cruz 
  Lima, 
  Contr. 
  Mus. 
  Paraense 
  Emilio 
  Goeldi 
  Hist. 
  Nat., 
  English 
  ed., 
  

   vol. 
  1, 
  p. 
  203, 
  1945. 
  

  

  Seniocebus 
  Gray, 
  Catalogue 
  of 
  monkeys, 
  lemurs 
  and 
  fruit-eating 
  bats 
  in 
  the 
  col- 
  

   lection 
  of 
  the 
  British 
  Museum, 
  p. 
  68, 
  1870 
  (genotype, 
  Seniocebus 
  bicolor 
  

   [z=Midas 
  bicolor 
  Spix], 
  by 
  monotypy). 
  

  

  Distribution 
  (map, 
  fig. 
  59). 
  — 
  North 
  bank 
  of 
  Rio 
  Amazonas 
  from 
  

  

  