﻿[75] 
  DECAPODA 
  FROM 
  ALBATROSS 
  DREDGINGS. 
  679 
  

  

  The 
  eye-stalks 
  and 
  eyes 
  are 
  very 
  similar 
  to 
  those 
  of 
  Meningodora 
  mol- 
  

   lis, 
  but 
  the 
  eyes 
  are 
  apparently 
  a 
  little 
  smaller 
  and 
  are 
  reddish, 
  instead 
  

   of 
  black, 
  in 
  recently 
  preserved 
  alcoholic 
  specimens. 
  

  

  The 
  mandibles 
  are 
  similar 
  to 
  those 
  of 
  Meningodora 
  mollis, 
  but 
  still 
  

   more 
  like 
  those 
  of 
  Acanthephyra 
  Agassizii, 
  the 
  mesial 
  edges 
  being 
  armed 
  

   very 
  nearly 
  as 
  in 
  that 
  species. 
  The 
  distal 
  segment 
  of 
  the 
  protognath 
  of 
  

   the 
  first 
  maxilla 
  is 
  very 
  much 
  broader 
  than 
  in 
  Meningodora 
  mollis 
  or 
  any 
  

   of 
  the 
  species 
  of 
  Acanthephyra 
  which 
  I 
  have 
  examined, 
  the 
  mesial 
  edge 
  

   being 
  fully 
  as 
  long 
  as 
  that 
  of 
  the 
  proximal 
  segment, 
  which, 
  however, 
  is 
  

   considerably 
  narrower 
  mesially 
  than 
  in 
  Meningodora 
  mollis 
  ; 
  the 
  endo- 
  

   gnath 
  is 
  like 
  that 
  of 
  the 
  Meningodora. 
  The 
  two 
  divisions 
  of 
  the 
  distal 
  

   segment 
  of 
  the 
  protognath 
  of 
  the 
  second 
  maxilla 
  are 
  nearly 
  equal 
  and 
  

   much 
  broader 
  and 
  shorter 
  than 
  in 
  Meningodora 
  mollis, 
  and 
  do 
  not 
  pro- 
  

   ject 
  mesially 
  beyond 
  the 
  proximal 
  segment, 
  as 
  they 
  do 
  in 
  the 
  species 
  of 
  

   Acanthephyra, 
  Meningodora, 
  Notostomus, 
  and 
  Ephyrina; 
  otherwise 
  the 
  

   second 
  maxillae 
  do 
  not 
  differ 
  from 
  those 
  of 
  Meningodora. 
  The 
  maxilli- 
  

   peds 
  differ 
  essentially 
  from 
  those 
  in 
  the 
  allied 
  genera 
  in 
  having 
  the 
  en- 
  

   dopod 
  composed 
  of 
  two 
  segments 
  only, 
  a 
  very 
  short 
  proximal 
  segment 
  

   and 
  a 
  long 
  unsegmented 
  distal 
  one. 
  

  

  The 
  first 
  gnathopods 
  bear 
  no 
  podobranchiae 
  in 
  the 
  typical 
  species, 
  

   though 
  there 
  are 
  small 
  or 
  rudimentary 
  podobranchiae 
  in 
  H. 
  gracilis, 
  and 
  

   the 
  distal 
  part 
  of 
  the 
  endognath 
  differs 
  from 
  that 
  of 
  Meningodora 
  mollis 
  

   in 
  having 
  the 
  dactylus 
  nearly 
  as 
  long 
  as 
  broad 
  and 
  attached 
  to 
  the 
  pro- 
  

   podus 
  by 
  a 
  much 
  less 
  oblique 
  articulation. 
  The 
  number 
  and 
  arrange- 
  

   ment 
  of 
  the 
  branchiae 
  and 
  epipods 
  on 
  the 
  succeeding 
  somites 
  are 
  the 
  

   same 
  as 
  in 
  the 
  allied 
  forms, 
  so 
  that 
  there 
  are 
  in 
  all, 
  on 
  each 
  side, 
  six 
  epi- 
  

   pods, 
  six 
  arthrobranchise, 
  and 
  five 
  pleurobranchiae. 
  The 
  second 
  gnath- 
  

   opods 
  and 
  first 
  and 
  second 
  peraeopods 
  do 
  not 
  differ 
  essentially 
  from 
  

   those 
  of 
  Meninogodora 
  mollis, 
  although 
  the 
  secoud 
  peraeopods 
  are 
  less 
  

   slender 
  and 
  more 
  like 
  the 
  first 
  than 
  in 
  that 
  species, 
  and 
  both 
  pairs 
  are 
  

   somewhat 
  more 
  hairy. 
  There 
  is 
  a 
  peculiar 
  excavation 
  on 
  the 
  iuner 
  dor- 
  

   sal 
  surface 
  of 
  the 
  carpus 
  in 
  the 
  first 
  pair, 
  as 
  in 
  the 
  allied 
  genera 
  and 
  as 
  

   shown 
  conspicuously 
  in 
  the 
  species 
  of 
  Notostomus. 
  This 
  excavation 
  is 
  

   longitudinal, 
  deepest 
  at 
  the 
  distal 
  end, 
  and 
  the 
  mesial 
  margin 
  hairy 
  or 
  

   setose, 
  while 
  the 
  opposite 
  margin 
  rises 
  suddenly 
  into 
  a 
  tubercular 
  or 
  

   spiniform 
  protuberance 
  just 
  over 
  the 
  articulation 
  with 
  the 
  chela. 
  The 
  

   third 
  and 
  fourth 
  peraeopods 
  are 
  more 
  like 
  those 
  of 
  Acanthephyra 
  Agas- 
  

   sizii 
  than 
  those 
  of 
  Meningodora 
  mollis, 
  being 
  armed 
  with 
  small 
  spines 
  

   and 
  setae, 
  and 
  the 
  propodi 
  and 
  dactyli 
  neither 
  grooved 
  conspicuously 
  

   nor 
  carinated. 
  The 
  fifth 
  peraeopods 
  are 
  shorter 
  and 
  stouter 
  than 
  in 
  

   Meningodora 
  and 
  very 
  distinctly 
  subchelate, 
  the 
  stout 
  and 
  conspicu- 
  

   ous, 
  though 
  short, 
  dactylus 
  closing 
  against 
  a 
  digital 
  process 
  of 
  the 
  pro- 
  

   podus 
  fully 
  half 
  its 
  own 
  length. 
  

  

  The 
  dorsum 
  of 
  the 
  pleon 
  is 
  neither 
  carinated 
  nor 
  toothed. 
  The 
  pleura 
  

   of 
  the 
  second 
  somite 
  are 
  not 
  as 
  figured 
  by 
  Buchholz, 
  but 
  overlap 
  those 
  

  

  