﻿6 
  Mr. 
  E. 
  I. 
  Pocock 
  on 
  the 
  

  

  very 
  desirable 
  that 
  more 
  should 
  be 
  ascertained 
  of 
  the 
  structure 
  

   of 
  the 
  polypides, 
  as 
  a 
  study 
  of 
  their 
  anatomy 
  is 
  necessary 
  

   before 
  the 
  structural 
  relations 
  of 
  the 
  animal 
  can 
  be 
  made 
  out. 
  

  

  EXPLANATION 
  OF 
  PLATE 
  I. 
  

  

  Fig. 
  1. 
  View 
  of 
  Ascorhiza 
  (entire), 
  a, 
  foreign 
  body, 
  to 
  which 
  the 
  stem 
  

   of 
  Ascorhiza 
  is 
  attached 
  ; 
  b, 
  capitulum 
  or 
  club-shaped 
  zoarium 
  ; 
  

   d, 
  brown 
  bodies 
  seen 
  through 
  the 
  external 
  walls 
  of 
  the 
  capitu- 
  

   lum 
  ; 
  s, 
  stem 
  or 
  stalk, 
  showing 
  its 
  joints. 
  

  

  Fig. 
  2. 
  Polypide 
  of 
  Ascorhiza 
  (very 
  much 
  magnified). 
  

  

  Fig. 
  3. 
  Two 
  neighbouring 
  polypides 
  (young) 
  with 
  tentacles 
  retracted. 
  

  

  Fig. 
  4. 
  Single 
  polypide 
  with 
  retracted 
  tentacles, 
  showing 
  the 
  network 
  of 
  

   tuhes 
  on 
  the 
  external 
  surface 
  of 
  the 
  capitulum. 
  

  

  Fig. 
  5. 
  Distal 
  end 
  of 
  the 
  stalk 
  adjoining 
  the 
  capitulum. 
  

  

  Fig. 
  6. 
  Portion 
  of 
  the 
  stalk, 
  showing 
  longitudinal 
  muscles 
  of 
  two 
  joints. 
  

  

  Cambridge, 
  Mass., 
  U. 
  S. 
  A., 
  

   May 
  1888. 
  

  

  II. 
  — 
  Contributions 
  to 
  our 
  Knowledge 
  of 
  the 
  Crustacea 
  of 
  

   Dominica. 
  By 
  R. 
  I. 
  POCOCK, 
  of 
  the 
  British 
  Museum 
  

  

  (Natural 
  History). 
  

  

  [Plate 
  II.] 
  

  

  The 
  Crustacea 
  forming 
  the 
  subject-matter 
  of 
  the 
  present 
  

   paper 
  were 
  collected 
  by 
  Mr. 
  G. 
  A. 
  Ramage, 
  who 
  has 
  been 
  

   engaged 
  in 
  the 
  investigation 
  of 
  the 
  fauna 
  and 
  flora 
  of 
  the 
  

   Lesser 
  Antilles 
  for 
  the 
  West-Indies 
  Exploration 
  Committee. 
  

   In 
  addition 
  to 
  the 
  land 
  and 
  freshwater 
  forms, 
  which 
  con- 
  

   stitute 
  the 
  greater 
  part 
  of 
  the 
  collection, 
  specimens 
  of 
  the 
  

   following 
  wide-spread 
  Antillean 
  and 
  Central- 
  American 
  littoral 
  

   species 
  were 
  sent 
  home 
  : 
  — 
  

  

  Miihrax 
  spinosissimus, 
  Lamarck. 
  

   Carjnlius 
  corallinus, 
  Herbst. 
  

   Orapsus 
  macidatus, 
  Catesby. 
  

   Cenobita 
  diogenes, 
  Latreille. 
  

  

  BRACHYURA. 
  

  

  Gecarcinus 
  lateralis, 
  Freminville. 
  

  

  Gecarcinus 
  lateralis, 
  Freminville, 
  Milne-Edwards, 
  Hist. 
  nat. 
  Crust, 
  

   ii. 
  p. 
  27, 
  pi. 
  xviii. 
  fig. 
  1. 
  

  

  Eight 
  specimens, 
  collected 
  near 
  the 
  sea 
  on 
  Point 
  Michelle. 
  

  

  