﻿606 
  REPORT 
  OF 
  COMMISSIONER 
  OF 
  FISH 
  AND 
  FISHERIES. 
  [5s] 
  

  

  mens 
  examined 
  were 
  carrying 
  eggs 
  a 
  zero 
  (0) 
  is 
  used. 
  The 
  National 
  

   Museum 
  Crustacea 
  Catalogue 
  numbers 
  are 
  given 
  in 
  the 
  tables 
  of 
  speci- 
  

   mens 
  examined, 
  or 
  are 
  simply 
  placed 
  in 
  parentheses 
  after 
  the 
  mention 
  

   of 
  the 
  specimens. 
  In 
  a 
  few 
  cases 
  among 
  the 
  Paguroidea, 
  specimens 
  

   selected 
  for 
  their 
  carcincecia, 
  were 
  catalogued 
  among 
  Actinozoa, 
  in 
  a 
  

   different 
  catalogue 
  from 
  the 
  Crustacea, 
  and 
  such 
  catalogue 
  numbers 
  are 
  

   preceded 
  by 
  an 
  A, 
  to 
  distinguish 
  them 
  from 
  the 
  Crustacea 
  catalogue 
  

   numbers. 
  

  

  In 
  the 
  first 
  report 
  on 
  the 
  Crustacea 
  of 
  the 
  Albatross 
  collections, 
  I 
  

   gave 
  no 
  general 
  statement 
  of 
  results, 
  but 
  confined 
  myself 
  strictly 
  to 
  

   the 
  enumeration 
  of 
  the 
  specimens 
  taken 
  and 
  the 
  description 
  of 
  the 
  

   many 
  new 
  forms 
  discovered. 
  Here, 
  however, 
  I 
  propose 
  to 
  discuss 
  some 
  

   of 
  the 
  results 
  of 
  the 
  examination 
  of 
  the 
  Decapoda 
  of 
  the 
  two 
  seasons' 
  

   work. 
  The 
  collections 
  made 
  in 
  the 
  West 
  Indian 
  region 
  by 
  the 
  Alba- 
  

   tross, 
  during 
  the 
  winters 
  of 
  1884 
  and 
  1885, 
  have 
  not 
  yet 
  been 
  fully 
  ex- 
  

   amined, 
  and 
  are 
  not 
  referred 
  to 
  in 
  the 
  following 
  statements, 
  which 
  apply 
  

   exclusively 
  to 
  the 
  region 
  north 
  of 
  Cape 
  Hatteras 
  ; 
  but 
  some 
  of 
  the 
  re- 
  

   sults, 
  in 
  regard 
  to 
  bathyinetrical 
  range, 
  &c, 
  of 
  a 
  partial 
  examination 
  

   of 
  the 
  collection 
  of 
  the 
  summer 
  of 
  1885 
  are 
  included. 
  

  

  The 
  most 
  interesting 
  feature 
  of 
  the 
  Crustacea 
  collected 
  by 
  the 
  Alba- 
  

   tross 
  is 
  the 
  great 
  number 
  of 
  very 
  deep-water, 
  or 
  abyssal, 
  species 
  of 
  

   Decapoda 
  which 
  it 
  contains. 
  The 
  whole 
  number 
  of 
  species 
  of 
  true 
  

   Decapoda 
  dredged 
  by 
  the 
  Albatross 
  north 
  of 
  Cape 
  Hatteras 
  is 
  over 
  130, 
  

   but 
  nearly 
  one-half 
  of 
  these 
  are 
  from 
  shallow 
  or 
  comparatively 
  shallow 
  

   water. 
  None 
  of 
  the 
  shallow- 
  water 
  species 
  were 
  taken 
  below 
  1,000 
  

   fathoms, 
  and 
  it 
  is, 
  perhaps, 
  best 
  to 
  limit 
  the 
  abyssal 
  fauna 
  to 
  species 
  

   occurring 
  in 
  depths 
  greater 
  than 
  this, 
  although 
  some 
  true 
  deep-water 
  

   species 
  are 
  probably 
  excluded 
  by 
  adopting 
  so 
  great 
  a 
  depth. 
  Taking 
  

   this 
  limit 
  strictly, 
  however, 
  we 
  have 
  43 
  abyssal 
  species, 
  of 
  which 
  22 
  have 
  

   been 
  taken 
  below 
  2,000 
  fathoms, 
  as 
  shown 
  in 
  the 
  following 
  list: 
  

  

  LIST 
  OF 
  DECAPODA 
  TAKEN 
  NORTH 
  OF 
  CAPE 
  HATTERAS, 
  BELOW 
  1,000 
  

   FATHOMS, 
  BY 
  THE 
  ALBATROSS 
  IN 
  1883-'84-'85, 
  WITH 
  THE 
  BATHYMET- 
  

   RICAL 
  RANGE 
  OF 
  EACH 
  SPECIES 
  AND 
  A 
  BRIEF 
  STATEMENT 
  OF 
  THE 
  

   CHARACTER 
  OF 
  THE 
  EYES. 
  

  

  BRACHYURA. 
  

   CANCROIDEA. 
  

  

  1. 
  Geryon 
  quinquedens. 
  105 
  to 
  1,081 
  fathoms. 
  

  

  Eyes 
  well 
  developed, 
  black. 
  

  

  DORIPPOIDEA. 
  

  

  2. 
  Ethusina 
  abyssicola. 
  1,497 
  to 
  2,221. 
  

  

  Eye-stalks 
  very 
  small, 
  immovably 
  imbedded 
  in 
  the 
  orbits, 
  and 
  tipped 
  with 
  

   minute, 
  distinctly 
  faceted, 
  black 
  eyes, 
  much 
  smaller 
  than 
  the 
  diameter 
  

   of 
  the 
  stalks. 
  

  

  