﻿PROCEEDINGS 
  OF 
  THE 
  UNITED 
  STATES 
  NATIONAL 
  MUSEUM 
  

  

  issued 
  lmKA.\l^ 
  h 
  'A' 
  

  

  SMITHSONIAN 
  INSTITUTION 
  

   U. 
  S. 
  NATIONAL 
  MUSEUM 
  

  

  Vol. 
  98 
  Washington: 
  1948 
  No. 
  3230 
  

  

  A 
  NEW 
  CRAYFISH 
  OF 
  THE 
  GENUS 
  CAMBARUS 
  FROM 
  

   TEXAS, 
  WITH 
  NOTES 
  ON 
  THE 
  DISTRIBUTION 
  OF 
  

   CAMBARUS 
  FODIENS 
  (COTTLE) 
  

  

  By 
  HoRTON 
  H. 
  HoBBs. 
  Jr. 
  

  

  The 
  new 
  crayfish 
  herein 
  described 
  is 
  a 
  member 
  of 
  the 
  Diogenes 
  sec- 
  

   tion, 
  a 
  rather 
  advanced 
  assemblage 
  of 
  species 
  belonging 
  to 
  the 
  genus 
  

   Camharus. 
  The 
  Diogenes 
  section 
  is 
  defined 
  by 
  Ortmann 
  (1931, 
  p. 
  

   146) 
  as 
  follows 
  : 
  "Carapace 
  ovate, 
  compressed, 
  and 
  without 
  lateral 
  

   spines. 
  Rostrum 
  without 
  marginal 
  spines. 
  Chelae 
  short, 
  ovate, 
  

   broad, 
  and 
  depressed. 
  Areola 
  very 
  narrow 
  or 
  obliterated 
  (linear) 
  

   in 
  the 
  middle, 
  always 
  distinctly 
  longer 
  than 
  one 
  third 
  of 
  the 
  carapace. 
  

   Eyes 
  well 
  developed." 
  

  

  Specimens 
  of 
  this 
  undescribed 
  species 
  have 
  been 
  previously 
  col- 
  

   lected 
  and 
  identified 
  as 
  Canibarus 
  argillicola 
  Faxon 
  \_ 
  = 
  C. 
  fodiens 
  

   (Cottle, 
  1863, 
  p. 
  217)], 
  and 
  while 
  there 
  are 
  a 
  number 
  of 
  references 
  to 
  

   it 
  in 
  the 
  literature, 
  most 
  of 
  them 
  are 
  repetitions 
  of 
  a 
  few 
  locality 
  rec- 
  

   ords. 
  The 
  synonymy 
  listed 
  below 
  is 
  as 
  nearly 
  complete 
  as 
  I 
  have 
  been 
  

   able 
  to 
  ascertain. 
  

  

  My 
  interest 
  in 
  the 
  problem 
  of 
  the 
  distribution 
  of 
  C. 
  fodiens 
  was 
  

   aroused 
  several 
  months 
  ago 
  when 
  Joel 
  W. 
  Hedgpeth, 
  of 
  the 
  Institute 
  

   of 
  Marine 
  Science, 
  Port 
  Aransas, 
  Tex., 
  sent 
  two 
  crayfishes 
  from 
  the 
  

   Aransas 
  Refuge 
  to 
  the 
  United 
  States 
  National 
  Museum 
  for 
  deter- 
  

   mination. 
  Upon 
  comparing 
  these 
  crayfishes 
  with 
  specimens 
  of 
  G. 
  

   fodiens 
  it 
  was 
  found 
  that 
  they 
  belonged 
  to 
  an 
  undescribed 
  species. 
  In 
  

   order 
  to 
  determine 
  the 
  range 
  of 
  this 
  new 
  form 
  it 
  was 
  necessary 
  to 
  

   attempt 
  to 
  clarify 
  a 
  few 
  of 
  the 
  questions 
  that 
  had 
  arisen 
  in 
  the 
  

   literature 
  as 
  to 
  the 
  range 
  of 
  C. 
  fodiens 
  and 
  my 
  conclusions 
  are 
  pre- 
  

   sented 
  at 
  the 
  end 
  of 
  this 
  paper. 
  

  

  223 
  

  

  T91246— 
  48 
  

  

  