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  REPORT 
  OF 
  COMMISSIONER 
  OF 
  FISH 
  AND 
  FISHERIES. 
  

  

  [28j 
  

  

  All 
  the 
  specimens 
  from 
  stations 
  2269, 
  2271, 
  22S3, 
  2291, 
  2302, 
  anft 
  

   2303 
  differ 
  conspicuously 
  in 
  color 
  from 
  all 
  the 
  specimens 
  from 
  stations 
  

   2285 
  and 
  2286, 
  and 
  from 
  all 
  ordinary 
  specimens 
  from 
  the 
  New 
  England 
  

   coast, 
  and 
  represent 
  a 
  well 
  marked 
  variety. 
  These 
  specimens, 
  though 
  

   recently 
  preserved, 
  like 
  the 
  others, 
  in 
  strong 
  alcohol, 
  present 
  no 
  trace 
  

   whatever 
  of 
  the 
  beautiful 
  dark 
  purplish 
  red 
  markings 
  upon 
  the 
  dorsal 
  

   surface 
  of 
  the 
  carapax, 
  chelipeds, 
  and 
  ambulatory 
  peraeopods, 
  these 
  

   parts 
  being 
  a 
  uniform 
  obscure 
  brownish 
  yellow, 
  except 
  the 
  spine 
  on 
  the 
  

   inner 
  side 
  of 
  the 
  carpus 
  and 
  a 
  few 
  tubercles 
  on 
  the 
  chela, 
  which 
  are 
  dark 
  

   reddish 
  brown 
  in 
  many 
  of 
  the 
  specimens. 
  The 
  smooth 
  areas 
  between 
  

   the 
  teeth 
  of 
  the 
  anterolateral 
  margin 
  of 
  the 
  carapax 
  are 
  very 
  much 
  

   larger' 
  and 
  more 
  conspicuous, 
  and 
  the 
  tubercles 
  of 
  the 
  margin 
  itself 
  are 
  

   larger 
  and 
  more 
  regular, 
  as 
  are 
  also 
  the 
  tubercles 
  on 
  the 
  dorsal 
  sur- 
  

   face 
  of 
  the 
  chelae 
  in 
  most 
  of 
  the 
  specimens. 
  The 
  following 
  measure- 
  

   ments 
  of 
  seven 
  specimens 
  of 
  the 
  unspotted 
  variety, 
  followed 
  by 
  sim- 
  

   ilar 
  measurements 
  of 
  four 
  normal 
  specimens 
  from 
  the 
  same 
  region, 
  and 
  

   two 
  others 
  from 
  Vineyard 
  Sound, 
  show 
  no 
  noticeable 
  differences 
  in 
  the 
  

   proportions 
  of 
  the 
  carapax 
  or 
  chelae 
  : 
  

  

  Measurements 
  in 
  millimeters. 
  

  

  Catalogue 
  number. 
  

   Station 
  

  

  Sex 
  

  

  Length 
  of 
  carapax, 
  including 
  frontal 
  spine. 
  . 
  

   Breadth 
  of 
  carapax 
  in 
  front 
  of 
  lateral 
  spiue. 
  

   Breadth 
  of 
  carapax, 
  including 
  lateral 
  spine. 
  

   Breadth 
  between 
  external 
  angles 
  of 
  orbits... 
  

  

  Length 
  of 
  chela 
  

  

  Height 
  of 
  chela 
  

  

  Length 
  of 
  dactjius 
  

  

  7228. 
  

   2283. 
  

  

  d 
  

  

  42.0 
  

   48.0 
  

   52.0 
  

   22. 
  :: 
  

   :::>. 
  5 
  

   11.4 
  

   19.0 
  

  

  8779. 
  

   2271. 
  

  

  d 
  

   45. 
  5 
  

   51.0 
  

   51.5 
  

   25.6 
  

   39. 
  5 
  

   12. 
  2 
  

   20.8 
  

  

  8813. 
  

   2303. 
  

  

  <S 
  

   47.5 
  

   54.0 
  

   57.3 
  

   25.3 
  

   42.0 
  

   12.7 
  

   22.0 
  

  

  7283. 
  

   2383. 
  

  

  d 
  

   50.0 
  

   56.5 
  

   6(1. 
  

   26.7 
  

   48.0 
  

   14.0 
  

   24.8 
  

  

  8751. 
  

   2269. 
  

  

  d 
  

   51.5 
  

  

  58. 
  5 
  

   63. 
  (I 
  

   26.6 
  

   49.0 
  

   14.0 
  

   26.0 
  

  

  8811. 
  

   2302. 
  

  

  ? 
  

  

  49.7 
  

   56.6 
  

   60.0 
  

   26.0 
  

   39.8 
  

   13.2 
  

   22.0 
  

  

  8856. 
  

   2291. 
  

  

  ? 
  

  

  52. 
  

   59. 
  

   63.0 
  

   27.6 
  

   42.0 
  

   13 
  8 
  

   24.5 
  

  

  Catalogue 
  number 
  

   Station 
  

  

  Sex 
  

  

  Length 
  of 
  carapax, 
  including 
  frontal 
  spine. 
  

   Breadth 
  of 
  carapax 
  in 
  front 
  of 
  lateral 
  spine 
  

   Breadth 
  of 
  carapax, 
  including 
  lateral 
  spine 
  

   Breadth 
  between 
  external 
  angles 
  of 
  orbits.., 
  

  

  Length 
  of 
  chela 
  , 
  

  

  Height 
  of 
  chela 
  

  

  Leugthof 
  dactylus 
  , 
  

  

  V.S. 
  

  

  d 
  

  

  69.0 
  

   80.0 
  

   84. 
  5 
  

   37.2 
  

   71.0 
  

   18. 
  5 
  

   40.0 
  

  

  