﻿244 
  Prof. 
  Carl 
  Chun 
  on 
  the 
  

  

  preserved 
  larval 
  tentacle 
  upon 
  the 
  oldest 
  gastric 
  polype. 
  Its 
  

   cnidaria, 
  as 
  already 
  mentioned, 
  are 
  furnished 
  with 
  a 
  terminal 
  

   vesicle, 
  two 
  terminal 
  lateral 
  filaments, 
  and 
  an 
  involucrum. 
  

   However, 
  they 
  scarcely 
  attain 
  half 
  the 
  size 
  of 
  the 
  definitive 
  

   cnidaria, 
  are 
  of 
  a 
  very 
  delicate 
  reddish 
  flesh-colour, 
  and 
  are 
  

   without 
  the 
  spiral 
  convolution 
  of 
  the 
  urticating 
  band. 
  

  

  Family 
  Forskalidse, 
  Hackel. 
  

  

  26. 
  ForsJcalia 
  ophiura, 
  Leuck. 
  

  

  The 
  common 
  ForsJcalia 
  of 
  the 
  Mediterranean 
  was 
  also 
  

   extraordinarily 
  abundant 
  at 
  the 
  Canaries 
  from 
  January 
  

   onwards, 
  occasionally 
  occurring 
  in 
  gigantic 
  examples, 
  the 
  

   nectostyle 
  of 
  which 
  measured 
  1 
  foot. 
  

  

  As 
  its 
  larval 
  tentacles 
  are 
  hitherto 
  unknown 
  I 
  remark 
  that 
  

   in 
  young 
  specimens 
  I 
  found 
  the 
  single 
  larval 
  tentacle 
  seated 
  

   upon 
  the 
  oldest 
  gastric 
  polyp, 
  while 
  all 
  the 
  other 
  polyps 
  pos- 
  

   sessed 
  the 
  definitive 
  tentacles. 
  The 
  cnidaria 
  of 
  the 
  former 
  

   resemble 
  the 
  larval 
  batteries 
  of 
  Agalrna 
  and 
  Halistemma 
  ; 
  at 
  

   the 
  extremity 
  they 
  are 
  beset 
  with 
  the 
  uncommonly 
  long 
  

   sensorial 
  seta3, 
  and 
  characterized 
  by 
  two 
  lateral 
  intensely 
  

   brownish-red 
  tubercles, 
  projecting 
  like 
  ocelli, 
  upon 
  which 
  long 
  

   vibratile 
  cilia 
  are 
  inserted. 
  

  

  27. 
  ForsJcalia 
  co?itorta, 
  Leuck. 
  

  

  To 
  ForsTcalia 
  contorfa 
  I 
  refer 
  several 
  young 
  specimens, 
  still 
  

   furnished 
  with 
  larval 
  tentacles, 
  which 
  occurred 
  singly 
  from 
  

   January 
  onwards. 
  The 
  larval 
  cnidaria 
  resemble 
  those 
  of 
  

   F. 
  ophiura, 
  except 
  that 
  the 
  sensorial 
  setas 
  are 
  shorter, 
  and 
  the 
  

   two 
  pigmented 
  tubercles 
  are 
  wanting. 
  

  

  28. 
  ForsJcalia 
  cuneata, 
  sp. 
  n. 
  

  

  Subumbrella 
  of 
  the 
  nectocalyces 
  furnished 
  on 
  each 
  side 
  with 
  

   4-6 
  streaks 
  of 
  intensely 
  bright 
  red 
  pigment. 
  Gastric 
  polyps 
  

   remarkably 
  large, 
  standing 
  in 
  a 
  very 
  distinctly 
  marked 
  spiral 
  

   turned 
  to 
  the 
  right. 
  Hepatic 
  streaks 
  reddish 
  brown. 
  Cni- 
  

   darian 
  knobs 
  bright 
  red. 
  Bracts 
  wedge-shaped, 
  the 
  outer 
  

   surface 
  truncated 
  at 
  right 
  angles 
  and 
  completely 
  filling 
  up 
  the 
  

   interspace 
  between 
  the 
  different 
  spiral 
  turns. 
  Vascular 
  canal 
  

   of 
  the 
  bracts 
  bent 
  at 
  a 
  right 
  angle. 
  

  

  The 
  handsome 
  ForsJcalia 
  cuneata 
  does 
  not 
  become 
  so 
  large 
  

   as 
  the 
  allied 
  species 
  (it 
  attains 
  a 
  length 
  of 
  70 
  millim.), 
  but 
  it 
  

   is 
  not 
  less 
  remarkable 
  by 
  its 
  vivid 
  pigmentation 
  and 
  its 
  par- 
  

   ticularly 
  large 
  gastric 
  polyps. 
  From 
  the 
  pigmentation 
  of 
  the 
  

   subumbrella, 
  which 
  ic 
  never 
  wanting, 
  and 
  is 
  observable 
  in 
  no 
  

  

  