﻿516 
  COLLECTIONS 
  FROM 
  THE 
  AVESTERN 
  INDIAN 
  OCEAN. 
  

  

  Glorioso 
  Islands. 
  Beach 
  and 
  reef 
  at 
  low 
  water, 
  May 
  1882 
  (No. 
  220) 
  ; 
  

  

  7-10 
  fnis., 
  sand 
  and 
  mud, 
  May 
  1882 
  (No. 
  219). 
  

   Mozambique. 
  Beach, 
  between 
  tide-marks, 
  May 
  1882 
  (Nos. 
  224, 
  22o, 
  

  

  227) 
  ; 
  specimens 
  found 
  in 
  the 
  interior 
  of 
  Tridacna-sheWs 
  (No. 
  237). 
  

  

  In 
  the 
  systematic 
  list 
  of 
  the 
  species 
  which 
  follows, 
  104 
  species 
  

   and 
  varieties 
  are 
  enumerated 
  from 
  the 
  African 
  subregion, 
  besides 
  

   13 
  which 
  were 
  collected 
  at 
  Singapore 
  and 
  are 
  not 
  included 
  in 
  

   this 
  Report; 
  of 
  these, 
  16 
  species 
  and 
  6 
  varieties 
  are 
  described 
  as 
  

   new 
  to 
  science. 
  38 
  species 
  and 
  varieties 
  are 
  indicated 
  as 
  new 
  to 
  

   the 
  African 
  subregion 
  ; 
  but 
  several 
  of 
  the 
  new 
  varieties 
  may 
  not 
  

   improbably 
  have 
  been 
  already 
  recorded 
  by 
  previous 
  writers 
  under 
  the 
  

   typical 
  designation 
  of 
  the 
  species. 
  

  

  Little 
  need 
  be 
  said 
  with 
  regard 
  to 
  the 
  geographical 
  distribution 
  

   of 
  the 
  species, 
  since 
  the 
  great 
  majority, 
  excejit 
  in 
  the 
  groups 
  Oxy- 
  

   rhyncha 
  and 
  Oxystomata 
  (which 
  arc 
  richest 
  in 
  undescribed 
  forms), 
  

   are 
  common 
  in 
  the 
  Indo-Pacific 
  region*, 
  but 
  confined, 
  with 
  few 
  

   exceptions, 
  to 
  that 
  area 
  of 
  distribution. 
  Such 
  exceptions 
  are 
  Grapsus 
  

   macidafus, 
  LiolopJius 
  2}^(i'nissimus, 
  Alplieus 
  edwardsii, 
  and 
  Gono- 
  

   clitcti/Ius 
  chiragra, 
  which 
  extend 
  into 
  the 
  Atlantic 
  region 
  ; 
  also 
  

   Tludamita 
  Integra 
  and 
  Ccdappa 
  gallus, 
  var. 
  hicornis 
  (if 
  the 
  distri- 
  

   bution 
  of 
  the 
  variety 
  be 
  included 
  in 
  that 
  of 
  the 
  ty])ical 
  form). 
  It 
  

   is 
  not 
  necessary 
  to 
  rejieat 
  here 
  what 
  has 
  been 
  already 
  noted 
  on 
  the 
  

   affinity 
  of 
  the 
  Crustacean 
  fauna 
  of 
  this 
  subregion 
  or 
  district 
  with 
  

   that 
  of 
  the 
  West 
  Indies 
  f. 
  

  

  List 
  of 
  the 
  Species, 
  shotuing 
  their 
  Geograj^hiccd 
  Range. 
  

  

  [N.B. 
  The 
  species 
  and 
  varieties 
  distinguished 
  by 
  an 
  astensk 
  are 
  those 
  which 
  

   I 
  believe 
  to 
  be 
  now 
  recorded 
  for 
  the 
  first 
  time 
  from 
  the 
  Mascarene 
  subregion 
  

   and 
  the 
  Eastern 
  coast 
  of 
  Africa. 
  The 
  term 
  "Oriental 
  Eegion 
  " 
  denotes 
  that 
  

   the 
  species 
  ranges 
  irom 
  the 
  African 
  coast 
  or 
  islands 
  adjacent 
  eastward 
  at 
  

   least 
  to 
  one 
  of 
  the 
  island-groups 
  of 
  the 
  Pacific 
  Ocean. 
  At 
  tlie 
  end 
  of 
  tliis 
  

   Report 
  a 
  table 
  is 
  appended, 
  showing 
  the 
  distribution 
  of 
  the 
  species 
  on 
  the 
  

   East-African 
  coast 
  and 
  the 
  islands 
  belonging 
  to 
  the 
  same 
  geographical 
  sub- 
  

   region.] 
  

  

  PODOPHTHALMIA. 
  

  

  D 
  E 
  C 
  A 
  P 
  D 
  A. 
  

   BRACnriTRA. 
  

  

  *Ac7icetts 
  leeviocidis, 
  sp. 
  n. 
  Seychelles. 
  

   Camiioscia 
  retusa, 
  Latreille. 
  Mozambique 
  ; 
  Oriental 
  Region. 
  

  

  * 
  Prof. 
  F. 
  W. 
  Hutton, 
  in 
  a 
  recent 
  article 
  on 
  Zoological 
  Geography, 
  adopts 
  

   the 
  terms 
  Province 
  and 
  District 
  for 
  marine 
  geographical 
  divisions 
  in 
  contra- 
  

   distinction 
  to 
  the 
  terms 
  Region 
  and 
  Subregion, 
  which 
  he 
  restricts 
  to 
  the 
  land 
  

   divisions 
  {lide 
  'New 
  Zciiland 
  Journal 
  of 
  Science,' 
  i. 
  p. 
  190, 
  footnote, 
  1882). 
  

  

  t 
  Proc. 
  Zool. 
  Soc. 
  p. 
  539 
  (1882). 
  

  

  