﻿622 
  

  

  REPORT 
  OF 
  COMMISSIONER 
  OF 
  FISH 
  AND 
  FISHERIES. 
  

  

  [18] 
  

  

  Lispognathus 
  Thomsoni 
  A. 
  M.-Edward8. 
  

  

  Ddrynchus 
  Thomsoni 
  Norman, 
  in 
  Thomson, 
  Depths 
  of 
  the 
  Sea, 
  p. 
  174 
  (cut), 
  

   1873. 
  

  

  Lispognathus 
  Thomsoni 
  A. 
  M.-Edwards. 
  Rapport 
  sur 
  la 
  Faune 
  sous-marine 
  

   dans 
  les 
  grandes 
  profondeurs 
  de 
  la 
  Me"diterran6e 
  et 
  de 
  l'Oce'au 
  Atlantique 
  

   (Arch. 
  Missions 
  Sci. 
  et 
  Litteraires, 
  ix), 
  pp. 
  16, 
  39, 
  1882 
  ; 
  Recueil 
  de 
  figures 
  

   de 
  Crustacds 
  nouveaux 
  ou 
  peu 
  connus, 
  pi. 
  [3], 
  1883. 
  

  

  Lispognathus 
  fnrcatus 
  Smith, 
  Proc. 
  National 
  Mus., 
  vi, 
  p. 
  12, 
  1883. 
  

  

  (Plate 
  I, 
  Figs. 
  1, 
  la.) 
  

   Specimens 
  examined. 
  

  

  The 
  specimens 
  taken 
  in 
  1881 
  and 
  1882 
  were 
  referred 
  very 
  doubtfully 
  

   to 
  A. 
  M.-Edwards's 
  L. 
  furcillatus* 
  before 
  I 
  bad 
  seen 
  the 
  figure 
  in 
  Ms 
  

   great 
  work 
  on 
  the 
  Crustacea 
  of 
  the 
  Mexican 
  region. 
  A 
  comparison 
  

   with 
  Milnc-Edwards's 
  figure 
  (which 
  is 
  that 
  of 
  a 
  female, 
  and 
  not 
  of 
  

   a 
  male 
  as 
  stated 
  in 
  the 
  explanation 
  of 
  the 
  plate) 
  appears 
  to 
  indicate 
  

   that 
  our 
  specimens 
  are 
  specifically 
  distinct, 
  but 
  a 
  comparison 
  of 
  them 
  with 
  

   lour 
  females 
  of 
  L. 
  Thomsoni, 
  from 
  the 
  Bay 
  of 
  Biscay, 
  received 
  from 
  the 
  

   liev. 
  Dr. 
  Norman, 
  shows 
  that 
  they 
  are 
  very 
  closely 
  allied 
  to 
  that 
  species, 
  

   and 
  probably 
  only 
  a 
  robust 
  variety 
  of 
  it. 
  Our 
  specimens 
  are 
  all 
  consid- 
  

   erably 
  larger 
  than 
  any 
  of 
  those 
  from 
  the 
  Bay 
  of 
  Biscay, 
  and 
  have 
  the 
  

   carapax 
  broader 
  and 
  its 
  spines 
  larger 
  and 
  stouter. 
  These 
  differences 
  

   are 
  so 
  slight, 
  however, 
  that 
  I 
  think 
  a 
  large 
  series 
  of 
  specimens 
  from 
  the 
  

   two 
  sides 
  of 
  the 
  Atlantic 
  would 
  show 
  all 
  intermediate 
  forms. 
  On 
  ac- 
  

   count 
  of 
  the 
  differences 
  exhibited, 
  I 
  give 
  the 
  following 
  full 
  description 
  

   of 
  the 
  three 
  specimens 
  enumerated 
  above: 
  

  

  The 
  carapax, 
  excluding 
  the 
  rostral 
  and 
  lateral 
  spines, 
  is 
  about 
  four- 
  

   fifths 
  as 
  broad 
  as 
  long 
  in 
  the 
  male, 
  and 
  slightly 
  broader 
  and 
  much 
  thicker 
  

   and 
  more 
  swollen 
  in 
  tbe 
  female. 
  The 
  rostral 
  horns 
  are 
  acicular, 
  very 
  

   slightly 
  divergent, 
  and 
  slightly 
  ascending, 
  and 
  in 
  the 
  male 
  nearly 
  three- 
  

  

  *In 
  Bull. 
  Mus. 
  Comp. 
  Zool.,vii,p. 
  9, 
  1880, 
  the 
  species 
  is 
  described 
  as 
  new 
  under 
  the 
  

   name 
  fnrcatus, 
  but 
  in 
  the 
  Crust. 
  Region 
  Mexicaine, 
  p, 
  349, 
  pi. 
  31 
  A, 
  fig. 
  4, 
  18S0, 
  the 
  same 
  

   specimen, 
  apparently, 
  is 
  described 
  under 
  the 
  name 
  furcillatus, 
  which 
  is 
  also 
  used 
  in 
  the 
  

   Rapport 
  sur 
  la 
  Faune 
  sons-marine 
  dans 
  les 
  graudes 
  profondeurs 
  de 
  la 
  M6diterrane"e 
  et 
  

   de 
  l'Ocean 
  Atlantique, 
  pp. 
  16, 
  39, 
  1882. 
  The 
  first 
  two 
  of 
  these 
  works 
  bear 
  the 
  same 
  date, 
  

   and, 
  although 
  the 
  Cambridge 
  Bulletin 
  probably 
  appeared 
  first, 
  it 
  seems 
  best 
  to 
  use 
  the 
  

   name 
  fur 
  oillatua, 
  apparently 
  adopted 
  by 
  Milne-Edwards 
  himself, 
  and 
  the 
  oue 
  used 
  in 
  

   connection 
  with 
  the 
  first-published 
  figure. 
  

  

  