﻿Siphonophora 
  of 
  the 
  Canary 
  Islands. 
  233 
  

  

  the 
  Canaries 
  throughout 
  the 
  whole 
  winter. 
  It 
  descends 
  into 
  

   deep 
  water, 
  as 
  I 
  obtained 
  a 
  specimen 
  in 
  the 
  closed 
  net 
  from 
  

   500 
  metres. 
  Huxley 
  correctly 
  surmises 
  that 
  the 
  Eudoxia- 
  

   groups 
  of 
  Bassia 
  become 
  developed 
  into 
  Sphenoides 
  australis, 
  

   Huxl. 
  This 
  supposition 
  I 
  can 
  confirm 
  by 
  direct 
  observation. 
  

  

  10. 
  Abylopsts* 
  quincunx, 
  sp. 
  n. 
  

  

  It 
  is 
  remarkable 
  that 
  hitherto 
  all 
  observers 
  have 
  confounded 
  

   with 
  each 
  other 
  the 
  two 
  most 
  abundant 
  species 
  of 
  Abyla, 
  

   namely 
  the 
  Mediterranean 
  Abyla 
  pentagona 
  and 
  the 
  Atlantic 
  

   species, 
  which 
  is 
  always 
  much 
  smaller. 
  The 
  Atlantic 
  form, 
  

   with 
  its 
  characteristic 
  hydroecium 
  produced 
  into 
  the 
  form 
  of 
  a 
  

   neck, 
  is 
  easily 
  distinguished 
  from 
  the 
  Abyla 
  pentagona 
  of 
  the 
  

   Mediterranean, 
  in 
  which 
  the 
  small 
  superior 
  calyx 
  is 
  seated 
  by 
  

   a 
  broad 
  base 
  upon 
  the 
  inferior 
  one. 
  Huxley 
  has 
  very 
  recog- 
  

   nizably 
  described 
  and 
  figured 
  the 
  Atlantic 
  species 
  as 
  Abyla 
  

   pentagona 
  (loc. 
  cit. 
  p. 
  40, 
  pi. 
  ii. 
  fig. 
  2). 
  As 
  Quoy 
  and 
  Gai- 
  

   mard 
  figure 
  the 
  Mediterranean 
  form 
  under 
  the 
  name 
  of 
  Calpe 
  

   pentagona, 
  I 
  give 
  the 
  Atlantic 
  one 
  that 
  of 
  Abylopsis 
  quin- 
  

   cunx. 
  

  

  Their 
  Eudoxia-gvoups 
  are 
  developed 
  into 
  Aglaismoides 
  

   Eschsc/toltzii, 
  Huxl., 
  as 
  I 
  have 
  been 
  able 
  to 
  trace 
  in 
  detail. 
  

   The 
  latter 
  differs 
  in 
  the 
  form 
  of 
  the 
  bract 
  from 
  the 
  Eudoxia 
  

   cuboides 
  which 
  belongs 
  to 
  A. 
  pentagona. 
  

  

  17. 
  Ceratocymba 
  spectabilis, 
  sp. 
  n. 
  

  

  As 
  Ceratocymba 
  I 
  describe 
  the 
  only 
  Eudoxia, 
  the 
  deriva- 
  

   tion 
  of 
  which 
  from 
  a 
  previously 
  known 
  Abyla 
  I 
  am 
  unable 
  to 
  

   demonstrate. 
  1 
  regret 
  the 
  more 
  that 
  the 
  polygastric 
  colony 
  

   to 
  which 
  it 
  belongs 
  did 
  not 
  occur, 
  as 
  it 
  must 
  certainly 
  be 
  a 
  

   very 
  remarkable 
  form 
  ; 
  for 
  the 
  splendid 
  Ceratocymba, 
  which 
  

   is 
  not 
  less 
  than 
  23 
  millim. 
  long, 
  represents 
  the 
  largest 
  of 
  all 
  

   known 
  Eudoxise. 
  It 
  consequently 
  attains 
  the 
  length 
  of 
  a 
  

   full-grown 
  Abyla 
  trigona 
  or 
  Abylopsis 
  pentagona. 
  

  

  The 
  large 
  bract 
  resembles 
  a 
  helmet 
  with 
  two 
  laterally 
  pro- 
  

   jecting 
  triangular 
  horns. 
  The 
  remarkably 
  large 
  oil-receptacle 
  

   is 
  curved 
  like 
  a 
  note 
  of 
  interrogation 
  (?), 
  and 
  is 
  produced 
  at 
  

   its 
  tip 
  into 
  two 
  very 
  long 
  canals 
  passing 
  obliquely 
  outwards 
  

   into 
  the 
  angular 
  processes 
  of 
  the 
  bract. 
  The 
  dorsal 
  surface 
  

   of 
  the 
  oil-receptacle 
  is 
  coated 
  with 
  particularly 
  large 
  fluid-cells 
  

  

  * 
  As 
  the 
  generic 
  name 
  Calpe, 
  employed 
  by 
  Quoy 
  and 
  Gaimard, 
  had 
  

   already 
  been 
  made 
  use 
  of 
  by 
  Treitschke 
  in 
  182-j 
  for 
  a 
  butterfly, 
  I 
  propose 
  

   to 
  replace 
  it 
  by 
  Abylnpxis. 
  In 
  the 
  conception 
  of 
  tin; 
  genus 
  1 
  follow 
  

   Huxley. 
  

  

  