﻿REMARKABLE 
  MARINE 
  INVERTEBRATA 
  NEW 
  TO 
  THE 
  BRITISH 
  SEAS. 
  313 
  

  

  peduncle 
  is 
  pyramidal, 
  and 
  composed 
  of 
  four 
  triangular 
  lobes, 
  corresponding 
  

   with 
  the 
  four 
  gastrovascular 
  canals. 
  Each 
  lobe 
  is 
  of 
  a 
  tawny-yellow 
  colour, 
  with 
  

   a 
  dark 
  orange 
  centre, 
  and 
  as 
  it 
  is 
  narrow, 
  the 
  four 
  combined, 
  when 
  seen 
  from 
  

   above, 
  appear 
  as 
  a 
  small 
  yellow 
  cross, 
  with 
  an 
  inner 
  cross 
  of 
  orange. 
  From 
  the 
  

   dependant 
  apex 
  of 
  the 
  peduncle 
  hangs 
  a 
  short 
  and 
  narrow 
  colourless 
  stomach. 
  

   the 
  lips 
  of 
  which 
  are 
  produced 
  into 
  bifurcated 
  tentacular 
  processes 
  of 
  no 
  great 
  

   length. 
  

  

  Several 
  examples 
  of 
  this 
  animal 
  were 
  taken 
  off 
  Loch 
  Laigh 
  in 
  Mull. 
  

  

  Hippocrene 
  crucifera. 
  Sp. 
  Nov. 
  — 
  This 
  new 
  form 
  of 
  Hippocrene 
  differs 
  from 
  

   all 
  its 
  congeners 
  in 
  the 
  very 
  long 
  genital 
  lobes 
  springing 
  from 
  the 
  peduncle, 
  and 
  

   running 
  down 
  one-half 
  the 
  length 
  of 
  the 
  canals, 
  so 
  as 
  to 
  remind 
  us 
  of 
  the 
  ovaries 
  

   of 
  the 
  Thaumanlias. 
  It 
  was 
  taken 
  off 
  Tobermory. 
  

  

  The 
  umbrella 
  is 
  globular, 
  colourless, 
  and 
  smooth 
  ; 
  the 
  subumbrella 
  rather 
  

   large. 
  The 
  four 
  fascicles 
  of 
  tentacular 
  bulbs 
  are 
  each 
  of 
  an 
  oblong 
  and 
  some- 
  

   what 
  crescentic 
  shape, 
  tawny-orange 
  above 
  and 
  colourless 
  below. 
  Each 
  is 
  com- 
  

   posed 
  of 
  six 
  bulbs, 
  bearing 
  black 
  ocelli 
  on 
  their 
  pale 
  portions, 
  and 
  corresponding 
  

   to 
  as 
  many 
  short 
  transparent 
  colourless 
  tentacula. 
  The 
  peduncle 
  is 
  rather 
  short, 
  

   but 
  its 
  lobes, 
  which 
  are 
  of 
  a 
  tawny-yellow 
  colour, 
  with 
  a 
  double 
  line 
  of 
  orange 
  in 
  

   their 
  centres, 
  are 
  very 
  long 
  and 
  narrow, 
  somewhat 
  undulated, 
  and 
  prolonged 
  for 
  

   half 
  the 
  length 
  of 
  the 
  subumbrella, 
  appearing 
  like 
  so 
  many 
  arms. 
  The 
  anal 
  lobes 
  

   are 
  colourless; 
  they 
  are 
  produced 
  into 
  short 
  and 
  proportionally 
  minute 
  labiai 
  

   tentacula, 
  each 
  of 
  the 
  four 
  presenting 
  a 
  simple 
  bifurcation. 
  

  

  Hippocrene 
  simplex. 
  Sp. 
  Nov. 
  — 
  This 
  species 
  is 
  more 
  nearly 
  allied 
  to 
  the 
  H. 
  

   britannica 
  than 
  the 
  others, 
  and 
  connects 
  that 
  well-known 
  form 
  with 
  H. 
  mgritella, 
  

   but 
  is 
  very 
  distinct 
  from 
  both. 
  

  

  The 
  umbrella 
  is 
  globular, 
  colourless, 
  and 
  smooth 
  ; 
  the 
  subumbrella 
  large 
  in 
  

   proportion. 
  The 
  four 
  fascicles 
  of 
  tentacular 
  bulbs 
  are 
  each 
  oblong, 
  yellow 
  below 
  

   and 
  orange 
  above 
  ; 
  each 
  is 
  composed 
  of 
  four 
  bulbs, 
  and 
  is 
  acutely 
  four-lobed, 
  

   bearing 
  four 
  black 
  ocelli 
  on 
  as 
  many 
  projections. 
  Only 
  one 
  yellowish 
  tentacle 
  

   (as 
  in 
  H. 
  nigritella) 
  springs 
  from 
  each 
  mass. 
  The 
  peduncle 
  resembles 
  that 
  of 
  

   H 
  britannica, 
  is 
  quadrate, 
  massive, 
  four-lobed, 
  and 
  of 
  a 
  dull 
  orange 
  hue. 
  The 
  

   stomach 
  is 
  short 
  and 
  wide, 
  terminating 
  in 
  four 
  colourless 
  labial 
  tentacles, 
  which 
  

   twice 
  bifurcate. 
  Several 
  specimens 
  were 
  taken 
  at 
  Tobermory. 
  

  

  Thaumantias 
  undulata. 
  Sp. 
  Nov. 
  — 
  When 
  sailing 
  through 
  the 
  Minch 
  on 
  a 
  

   very 
  warm 
  day, 
  when 
  the 
  sea 
  was 
  very 
  calm, 
  we 
  met 
  with 
  a 
  number 
  of 
  small 
  

   medusae, 
  each 
  measuring 
  about 
  an 
  inch 
  and 
  a-half 
  in 
  diameter, 
  and 
  conspicuous 
  

   in 
  the 
  water, 
  owing 
  to 
  the 
  undulated 
  pink 
  cross 
  which 
  marked 
  their 
  subumbrella. 
  

   On 
  capturing 
  some, 
  they 
  proved 
  to 
  belong 
  to 
  an 
  undescribed, 
  and 
  very 
  curious 
  

   form 
  of 
  the 
  genus 
  Thaumantias. 
  

  

  The 
  umbrella 
  is 
  hemispherical, 
  smooth, 
  and 
  colourless. 
  Its 
  margin 
  is 
  fringed 
  

   with 
  very 
  numerous 
  slender 
  coloured 
  tentacula, 
  which 
  are 
  often 
  carried 
  coiled 
  up 
  

  

  