﻿48 
  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM 
  vol.96 
  

  

  In 
  this 
  study 
  of 
  the 
  American 
  Gobiesocidae, 
  9 
  genera 
  and 
  25 
  species 
  

   and 
  subspecies 
  are 
  recognized. 
  By 
  far 
  the 
  greatest 
  majority 
  of 
  these 
  

   occur 
  in 
  the 
  tropical 
  Pacific. 
  Although 
  the 
  Gobiesocidae 
  are 
  mostly 
  

   marine 
  fishes, 
  a 
  few 
  species 
  have 
  been 
  taken 
  in 
  fresh-water 
  streams 
  

   a 
  short 
  distance 
  above 
  brackish 
  water, 
  clinging 
  to 
  the 
  stones. 
  

  

  Rimicola 
  of 
  the 
  Pacific 
  is 
  represented 
  in 
  the 
  Atlantic 
  by 
  the 
  genus 
  

   Acyrtus^ 
  but 
  the 
  genus 
  Infratridens 
  has 
  no 
  known 
  Atlantic 
  counter- 
  

   part. 
  Arhaciosa 
  has 
  five 
  forms 
  in 
  the 
  Pacific 
  and 
  but 
  one 
  in 
  the 
  

   Atlantic. 
  Sicyases 
  occurs 
  in 
  the 
  Pacific 
  only 
  at 
  the 
  southern 
  part 
  

   of 
  South 
  America. 
  Cotylis 
  has 
  four 
  species 
  in 
  the 
  Pacific 
  and 
  one 
  

   in 
  the 
  Atlantic. 
  Sicyogaster 
  has 
  an 
  interrupted 
  distribution, 
  with 
  

   one 
  species 
  along 
  the 
  Pacific 
  coast 
  of 
  southern 
  South 
  America 
  and 
  

   another 
  along 
  the 
  west 
  coast 
  of 
  the 
  United 
  States 
  and 
  British 
  Colum- 
  

   bia. 
  Arcos 
  has 
  one 
  species 
  on 
  each 
  side 
  of 
  Central 
  America. 
  

   Gohiesox 
  has 
  two 
  species 
  in 
  the 
  Atlantic, 
  and 
  three 
  in 
  the 
  Pacific 
  

   confined 
  to 
  tropical 
  waters. 
  

  

  Cocos 
  Island 
  presents 
  a 
  problem 
  that 
  needs 
  further 
  study. 
  So 
  far, 
  

   the 
  Pacific 
  representatives 
  of 
  Gohiesox 
  cephalus, 
  and 
  Cotylis 
  nigripin- 
  

   nis 
  from 
  the 
  Atlantic, 
  have 
  been 
  taken 
  only 
  on 
  Cocos 
  Island. 
  They 
  

   are 
  Gohiesox 
  fulvus 
  and 
  Cotylis 
  nigripinnis 
  woodsi. 
  

  

  The 
  records 
  of 
  Gohiesox 
  adustus 
  (Pellegrin, 
  Bull. 
  Mus. 
  Paris, 
  vol. 
  7, 
  

   p. 
  206, 
  1901, 
  and 
  Giinther, 
  Biologia 
  Centrali-Americana, 
  Pisces, 
  p. 
  4, 
  

   1906) 
  in 
  the 
  Rio 
  Chapalagana 
  at 
  Tepico 
  in 
  the 
  Rio 
  Grande 
  de 
  San- 
  

   tiago 
  may 
  be 
  some 
  other 
  species. 
  No 
  description 
  is 
  given, 
  and 
  thus 
  

   it 
  is 
  not 
  possible 
  to 
  place 
  the 
  above 
  record 
  with 
  any 
  species 
  until 
  the 
  

   specimens 
  have 
  been 
  re-examined. 
  

  

  While 
  this 
  study 
  was 
  being 
  made, 
  Dr. 
  S. 
  F. 
  Hildebrand 
  kindly 
  

   turned 
  over 
  to 
  me 
  some 
  notes 
  made 
  by 
  Dr. 
  W. 
  H. 
  Longley 
  on 
  types 
  in 
  

   certain 
  museums 
  of 
  Europe. 
  Though 
  most 
  difficult 
  to 
  read, 
  these 
  

   proved 
  of 
  considerable 
  value, 
  and 
  it 
  was 
  a 
  pleasure 
  to 
  note 
  that 
  I 
  

   came 
  to 
  the 
  same 
  conclusions 
  that 
  the 
  late 
  Dr. 
  Longley 
  had 
  inde- 
  

   pendently 
  arrived 
  at 
  in 
  regard 
  to 
  referring 
  certain 
  species 
  to 
  the 
  

   synonymy 
  of 
  others. 
  Although 
  his 
  notes 
  were 
  never 
  published, 
  some 
  

   of 
  the 
  conclusions 
  appeared 
  during 
  1933 
  and 
  1934. 
  

  

  The 
  following 
  key 
  was 
  prepared 
  after 
  examining 
  the 
  American 
  

   clingfishes 
  in 
  the 
  collections 
  of 
  the 
  United 
  States 
  National 
  Museum, 
  

   as 
  well 
  as 
  specimens 
  lent 
  by 
  the 
  Chicago 
  Natural 
  History 
  Museum 
  

   (F. 
  M. 
  N. 
  H.) 
  through 
  the 
  courtesy 
  of 
  Dr. 
  K. 
  P. 
  Schmidt 
  and 
  Mrs. 
  

   Marion 
  Grey, 
  and 
  others 
  lent 
  by 
  the 
  University 
  of 
  Michigan 
  Museum 
  

   of 
  Zoology 
  through 
  the 
  courtesy 
  of 
  Dr. 
  Carl 
  L. 
  Hubbs. 
  Dr. 
  C. 
  M. 
  

   Breder, 
  Jr., 
  of 
  the 
  American 
  Museum 
  of 
  Natural 
  History, 
  kindly 
  

   allowed 
  me 
  to 
  examine 
  the 
  holotype 
  of 
  Gohiesox 
  yuma 
  Nichols. 
  

  

  