﻿CEUSIACEA. 
  567 
  

  

  A 
  specimen 
  was 
  obtained 
  at 
  Providence 
  Island 
  or 
  He 
  des 
  Roches, 
  

   13-20 
  fms. 
  (Xo. 
  183), 
  and 
  also 
  one 
  at 
  Providence 
  licet", 
  24 
  fms. 
  

   (No, 
  215). 
  Both 
  are 
  apparently 
  females. 
  

  

  The 
  form 
  of 
  the 
  rostrum, 
  together 
  with 
  the 
  armature 
  of 
  the 
  ter- 
  

   minal 
  segment, 
  distinguish 
  this 
  species 
  from 
  all 
  with 
  which 
  1 
  am 
  

   acquainted. 
  

  

  Kossmann 
  (t. 
  c. 
  zweite 
  Iliilfte, 
  p. 
  100) 
  mentions 
  a 
  species 
  of 
  this 
  

   genus, 
  Gonodacfi/his 
  hrevisiptamaius, 
  Paulson, 
  occurring 
  in 
  the 
  Ptcd 
  

   Sea, 
  with 
  which 
  G. 
  elegans 
  may 
  possibly 
  be 
  identical 
  ; 
  but 
  as 
  1 
  have 
  

   never 
  seen 
  Paulson's 
  work, 
  I 
  can 
  say 
  nothing 
  of 
  the 
  true 
  affinities 
  

   of 
  G. 
  brevisquamatus. 
  

  

  There 
  is 
  in 
  the 
  collection 
  a 
  small 
  male 
  from 
  Providence 
  Island, 
  

   19 
  fms. 
  (No. 
  217), 
  which 
  is 
  allied 
  in 
  many 
  points 
  to 
  the 
  preceding 
  ; 
  

   but 
  the 
  rostrum 
  is 
  transverse, 
  with 
  its 
  distal 
  extremity 
  deflexed, 
  so 
  

   that 
  in 
  a 
  dorsal 
  view 
  it 
  appears 
  transversely 
  oblong, 
  with 
  a 
  straight 
  

   anterior 
  margin, 
  which 
  does 
  not 
  project 
  beyond 
  the 
  anterior 
  margin 
  

   of 
  the 
  lateral 
  divisions 
  of 
  the 
  carapace. 
  The 
  penultimate 
  post- 
  

   abdominal 
  segment 
  is 
  armed 
  with 
  six 
  teeth, 
  including 
  those 
  of 
  the 
  

   postero-lateral 
  angles. 
  The 
  terminal 
  segment 
  has 
  a 
  smaller 
  longi- 
  

   tudinal 
  carina 
  on 
  each 
  side 
  of 
  the 
  median 
  longitudinal 
  dorsal 
  carina. 
  

   The 
  terminal 
  joint 
  of 
  the 
  large 
  raptorial 
  limbs 
  (second 
  maxillipcdes) 
  

   is 
  even 
  less 
  distinctly 
  ventiicose 
  at 
  base, 
  and 
  its 
  inner 
  margin 
  is 
  

   armed 
  with 
  about 
  eight 
  teeth. 
  These 
  characters 
  may 
  be 
  peculiar 
  to 
  

   the 
  male 
  sex 
  ; 
  but 
  if 
  the 
  specimen 
  should 
  prove, 
  on 
  further 
  study, 
  

   to 
  belong 
  to 
  a 
  distinct 
  species, 
  I 
  would 
  propose 
  to 
  designate 
  it 
  G. 
  

   hrevirostris 
  (see 
  Plate 
  LII. 
  fig. 
  C). 
  

  

  Psendosquilla 
  eminisa 
  (De 
  Haan)* 
  is 
  perhaps 
  the 
  species 
  most 
  

   nearly 
  allied 
  to 
  our 
  new 
  Gonodactylus 
  ; 
  it 
  has 
  the 
  transverse 
  trun- 
  

   cated 
  rostrum 
  of 
  the 
  male 
  above 
  described, 
  with 
  the 
  few-spined 
  

   dactyl 
  of 
  the 
  female 
  ; 
  it 
  is 
  distinguished 
  not 
  merely 
  by 
  the 
  non- 
  

   ventricose 
  dactyl 
  of 
  the 
  raptorial 
  limbs 
  with 
  its 
  longer 
  spines, 
  but 
  

   also 
  (if 
  the 
  figure 
  be 
  correct) 
  by 
  the 
  distinctly 
  costated 
  sixth 
  post- 
  

   abdominal 
  segment, 
  the 
  slightly 
  divergent 
  lateral 
  dorsal 
  carina) 
  of 
  

   the 
  terminal 
  segment, 
  &c. 
  

  

  AMPIIIPODA. 
  

  

  1, 
  Mcera 
  diversimanus. 
  (Plate 
  LII. 
  fig. 
  D.) 
  

  

  The 
  body 
  is 
  slender, 
  with 
  the 
  coxaD 
  not 
  so 
  deep 
  as 
  their 
  respective 
  

   segments; 
  the 
  head 
  is 
  about 
  as 
  long 
  as 
  deep, 
  witli 
  a 
  small 
  triangular 
  

   median 
  rostral 
  lobe, 
  and 
  with 
  its 
  antcro-lateral 
  angles 
  rounded 
  ; 
  tho 
  

   00X03 
  of 
  the 
  first 
  segment 
  of 
  the 
  body 
  have 
  their 
  antcro-lateral 
  angles 
  

   acute 
  and 
  produced 
  below 
  the 
  lateral 
  margins 
  of 
  the 
  head; 
  in 
  the 
  

   succeeding 
  pairs 
  the 
  antcro-lateral 
  angles 
  are 
  rounded. 
  The 
  first 
  

  

  * 
  Fauna 
  Japouiea, 
  Crust, 
  p. 
  224, 
  pi. 
  li. 
  fig. 
  G 
  (1849). 
  

  

  