﻿On 
  a 
  new 
  African 
  Corethra. 
  399 
  

  

  of 
  Arran 
  are 
  still 
  preserved, 
  in 
  excellent 
  condition, 
  in 
  the 
  

   British 
  Museum, 
  and, 
  with 
  Dr. 
  W. 
  T. 
  Caiman's 
  kind 
  assist- 
  

   tance, 
  I 
  was 
  recently 
  able 
  to 
  examine 
  them. 
  The 
  third 
  

   uropods 
  are 
  very 
  plainly 
  to 
  be 
  seen, 
  and, 
  as 
  might 
  be 
  expected 
  

   from 
  the 
  above 
  statement, 
  the 
  inner 
  ramus 
  is 
  as 
  short 
  as 
  in 
  

   G. 
  marinus. 
  In 
  fact, 
  and 
  in 
  the 
  opinion 
  of 
  both 
  Dr. 
  Caiman 
  

   and 
  myself, 
  they 
  are 
  only 
  distinguishable 
  from 
  G. 
  marinus 
  

   by 
  the 
  S-shaped 
  eyes. 
  This 
  is 
  hardly 
  enough 
  to 
  constitute 
  

   a 
  distinct 
  species 
  — 
  indeed, 
  Spence 
  Bate 
  (Cat. 
  Amph. 
  Crust. 
  

   p. 
  209) 
  says 
  it 
  " 
  is 
  a 
  feature 
  by 
  no 
  means 
  to 
  be 
  depended 
  

   upon 
  as 
  a 
  specific 
  character. 
  Among 
  a 
  considerable 
  number 
  

   sent 
  to 
  me 
  by 
  Mr. 
  Barlee 
  (from 
  the 
  Shetlands) 
  the 
  eyes 
  

   were 
  as 
  frequently, 
  if 
  not 
  more 
  often, 
  of 
  a 
  linear 
  form." 
  He 
  

   figures 
  the 
  third 
  uropod 
  correctly 
  both 
  in 
  the 
  above 
  work 
  

   and 
  in 
  the 
  Brit. 
  Sess.-eyed 
  Crust, 
  p. 
  375, 
  showing 
  the 
  inner 
  

   ramus 
  less 
  than 
  half 
  the 
  length 
  of 
  the 
  outer, 
  yet 
  concludes 
  

   his 
  remarks 
  in 
  the 
  latter 
  work 
  by 
  saying 
  that 
  he 
  considers 
  

   G. 
  campylops 
  to 
  be 
  identical 
  with 
  G. 
  locusta 
  (Lin.) 
  of 
  Lilje- 
  

   borg 
  (' 
  Ofversigt 
  , 
  . 
  . 
  . 
  af 
  slagtet 
  Gammarus,' 
  p. 
  448), 
  in 
  

   which 
  the 
  inner 
  ramus 
  is 
  described 
  as 
  about 
  two-thirds 
  

   of 
  the 
  length 
  of 
  the 
  outer 
  ! 
  The 
  antennal 
  characters 
  are 
  

   not 
  of 
  much 
  importance, 
  and 
  it 
  is 
  impossible 
  to 
  resist 
  the 
  

   conclusion 
  that 
  G. 
  campylops, 
  Leach, 
  is 
  merely 
  a 
  variety 
  of 
  

   G. 
  marinus, 
  Leach. 
  

  

  It 
  follows 
  from 
  the 
  above 
  that 
  G. 
  campylops, 
  Leach, 
  of 
  

   G. 
  O. 
  Sars 
  (' 
  Amphipoda 
  of 
  Norway/ 
  p. 
  500, 
  pi. 
  176. 
  fig. 
  2), 
  

   is 
  not 
  that 
  species. 
  In 
  addition 
  to 
  the 
  character 
  of 
  the 
  

   third 
  uropods, 
  the 
  type 
  specimens 
  are 
  very 
  much 
  larger 
  — 
  

   about 
  12 
  mm. 
  Prof. 
  Sars 
  was 
  probably 
  misled 
  by 
  Leach's 
  

   mistake, 
  and 
  there 
  is 
  little 
  doubt 
  that 
  his 
  G. 
  campylops 
  is 
  a 
  

   young 
  G. 
  locusta. 
  In 
  a 
  specimen 
  of 
  the 
  latter, 
  from 
  a 
  

   gathering 
  of 
  all 
  ages 
  examined 
  by 
  me, 
  of 
  the 
  same 
  size 
  as 
  

   Sars's 
  campylops 
  (6 
  mm.), 
  the 
  lateral 
  angles 
  of 
  the 
  head 
  are 
  

   almost 
  rounded 
  and 
  the 
  telson 
  is 
  armed 
  with 
  a 
  single 
  lateral 
  

   spine 
  (both 
  unlike 
  the 
  adult), 
  exactly 
  as 
  shown 
  in 
  his 
  invariably 
  

   accurate 
  figures. 
  

  

  I 
  have 
  to 
  thank 
  Dr. 
  Caiman 
  for 
  much 
  valuable 
  assistance 
  

   in 
  the 
  above. 
  

  

  L. 
  — 
  A 
  new 
  African 
  Corethra. 
  

   By 
  Fred. 
  V. 
  Theobald, 
  M.A., 
  F.E.S., 
  &c. 
  

  

  Corethra 
  pallidipes, 
  sp. 
  n. 
  

   Head 
  almost 
  black, 
  rostrum 
  and 
  palpi 
  dark 
  brown. 
  

   Thorax 
  rich 
  deep 
  brown, 
  pleurte 
  ochreous 
  and 
  ochreous 
  brown. 
  

  

  