﻿[21] 
  DECAPODA 
  FROM 
  ALBATROSS 
  DKEDGINGS. 
  625 
  

  

  Measurements 
  in 
  millimeters. 
  

  

  Catalogue 
  manlier. 
  

   Station 
  : 
  

  

  8043 
  

   2200 
  

  

  Sex 
  

  

  Length 
  of 
  carapax, 
  including 
  rostral 
  and 
  posterior 
  spines 
  . 
  

   Length 
  of 
  carapax, 
  excluding 
  rostral 
  and 
  posterior 
  spines. 
  

  

  Length 
  of 
  rostral 
  horns 
  or 
  spines 
  

  

  Breadth 
  of 
  carapax, 
  including 
  lateral 
  spines 
  

  

  Breadth 
  of 
  carapax, 
  excluding 
  lateral 
  spines 
  

  

  Length 
  of 
  branchial 
  spines 
  

  

  Length 
  of 
  choliped 
  

  

  Length 
  of 
  chela 
  

  

  Breadth 
  of 
  chela 
  

  

  Length 
  of 
  dactylus 
  

  

  Length 
  of 
  first 
  ambulatory 
  pera;opod 
  

  

  Length 
  of 
  dactylus 
  

  

  Length 
  of 
  second 
  ambulatory 
  peraeopod 
  

  

  Length 
  of 
  dactylus 
  

  

  Length 
  of 
  fourth 
  ambulatory 
  perseopod 
  

  

  Length 
  of 
  dactylus 
  

  

  J 
  

  

  70 
  

  

  57 
  

  

  13 
  

  

  48 
  

  

  45 
  

  

  4 
  

  

  109 
  

  

  51 
  

   6.5 
  

  

  18 
  

   180 
  

  

  29 
  

   144 
  

  

  27 
  

   114 
  

  

  24 
  

  

  Prof. 
  G. 
  O. 
  Sars, 
  in 
  his 
  great 
  work 
  on 
  the 
  Crustacea 
  of 
  the 
  Norwegian 
  

   North-Atlantic 
  Expedition, 
  states 
  that 
  tins 
  species 
  is 
  evidently 
  con- 
  

   generic 
  with 
  Scyramathia 
  Carpenteri 
  A. 
  M.-Edwards, 
  and 
  his 
  excellent 
  

   figures 
  and 
  description 
  of 
  that 
  species 
  incline 
  me 
  not 
  only 
  to 
  adopt 
  the 
  

   same 
  view, 
  but 
  to 
  include, 
  with 
  A. 
  Agassizii, 
  all 
  the 
  other 
  American 
  

   species, 
  and, 
  moreover, 
  to 
  be 
  somewhat 
  doubtful 
  of 
  the 
  validity 
  of 
  the 
  

   genus 
  Scyramathia, 
  notwithstanding 
  that 
  Professor 
  Sars 
  regards 
  it 
  as 
  

   widely 
  separated 
  from 
  Anamathia. 
  In 
  regard 
  to 
  the 
  systematic 
  position 
  

   of 
  Scyramathia, 
  Professor 
  Sars 
  says: 
  "It 
  should 
  certainly, 
  from 
  the 
  

   structure 
  of 
  the 
  orbita 
  and 
  other 
  characters, 
  be 
  classed 
  under 
  the 
  family 
  

   Maiidse, 
  within 
  the 
  limits 
  at 
  present 
  usually 
  assigned 
  to 
  that 
  family, 
  

   hence 
  comparatively 
  remote 
  alike 
  from 
  the 
  genus 
  Amathia 
  and 
  from 
  the 
  

   genus 
  Scyra, 
  the 
  first 
  of 
  which 
  belongs 
  to 
  the 
  family 
  Pericerhhe, 
  accord- 
  

   ing 
  to 
  the 
  revision 
  of 
  the 
  Oxyrhyncha 
  lately 
  published 
  by 
  E. 
  Miers. 
  

   Again, 
  among 
  the 
  Maiidoe 
  it 
  unquestionably 
  belongs 
  to 
  the 
  sub-family 
  

   Maiinse, 
  and 
  would 
  seem 
  to 
  approximate 
  closest 
  to 
  the 
  genus 
  Hyastenus 
  

   White, 
  chiefly 
  represented 
  in 
  the 
  northern 
  part 
  of 
  the 
  Pacific 
  Ocean." 
  

  

  When 
  proposing 
  the 
  genus 
  Scyramathia, 
  A. 
  Milne-Edwards 
  (Comp. 
  

   lend. 
  Acad. 
  Sci. 
  Paris, 
  xci, 
  p. 
  35G, 
  1881) 
  gives 
  no 
  characters 
  whatever 
  

   by 
  which 
  it 
  may 
  be 
  distinguished 
  from 
  Anamathia, 
  but 
  from 
  the 
  fact 
  

   that 
  he 
  places 
  in 
  it 
  Scyra 
  umbonata 
  Stimpson,it 
  is 
  very 
  readily 
  inferred 
  

   that 
  he 
  regarded 
  the 
  peculiar 
  truncated 
  tubercles 
  with 
  which 
  the 
  cara- 
  

   pax 
  is 
  armed 
  in 
  both 
  species 
  as 
  the 
  principal 
  generic 
  character. 
  That 
  

   he 
  did 
  not 
  base 
  the 
  separation 
  on 
  the 
  character 
  of 
  the 
  orbits 
  is 
  evident 
  

   from 
  the 
  fact 
  that 
  he 
  has 
  retained 
  in 
  the 
  genus 
  Amathia 
  several 
  species 
  

   (one 
  of 
  which 
  is 
  very 
  likely 
  specifically 
  identical 
  with 
  A. 
  Agassizii) 
  in 
  

   which 
  the 
  structure 
  of 
  the 
  orbits 
  is 
  similar 
  to 
  that 
  in 
  Scyramathia 
  Car- 
  

   penteri. 
  Unfortunately 
  I 
  have 
  seen 
  no 
  specimens 
  of 
  the 
  Mediterranean 
  

   A. 
  Eissoana, 
  the 
  type 
  of 
  the 
  genus 
  Anamathia, 
  but 
  judging 
  by 
  the 
  fig- 
  

   ures 
  given 
  by 
  Eoux, 
  and 
  more 
  particularly 
  those 
  in 
  the 
  third 
  edition 
  of 
  

   Lo 
  Itegne 
  Animal 
  de 
  Cuvier, 
  it 
  is 
  very 
  closely 
  allied 
  to 
  the 
  American 
  

   species 
  referred 
  to 
  the 
  genus, 
  and 
  the 
  structure 
  of 
  the 
  orbits 
  appears 
  to 
  

   be 
  not 
  unlike 
  that 
  in 
  Scyramathia 
  Carpenteri, 
  except 
  that 
  no 
  supraorbital 
  

   or 
  preorbital 
  spines 
  or 
  processes 
  are 
  shown 
  in 
  the 
  figures, 
  and 
  their 
  ab- 
  

   S, 
  Mis. 
  70 
  40 
  

  

  