﻿REMARKABLE 
  MARINE 
  INVERTEBKATA 
  NEW 
  TO 
  THE 
  BRITISH 
  SEAS. 
  309 
  

  

  (Esophagus 
  elongated, 
  situated 
  on 
  the 
  left 
  side. 
  Stomach 
  cubical, 
  spongy, 
  or 
  

   glandular. 
  Intestinal 
  loop 
  large 
  and 
  open, 
  reaching 
  to 
  the 
  bottom 
  of 
  the 
  muscu- 
  

   lar 
  tunic 
  ; 
  its 
  ascending 
  portion 
  glandular, 
  probably 
  hepatic 
  ; 
  the 
  rectum 
  passes 
  

   from 
  the 
  ventral 
  to 
  the 
  right 
  side 
  of 
  the 
  oesophagus 
  ; 
  the 
  anus 
  is 
  on 
  the 
  dorsal 
  

   edge 
  of 
  the 
  sac 
  about 
  its 
  middle. 
  The 
  ovary 
  is 
  in 
  the 
  loop 
  of 
  the 
  intestine, 
  but 
  

   was 
  not 
  in 
  season 
  in 
  the 
  specimens 
  taken. 
  

  

  Testis 
  white, 
  ramifying 
  on 
  the 
  surface 
  of 
  the 
  ovary 
  ; 
  the 
  vas 
  deferens 
  runs 
  up 
  

   on 
  the 
  oesophagus 
  and 
  rectum 
  to 
  the 
  side 
  of 
  the 
  anus. 
  The 
  heart 
  is 
  in 
  the 
  loop 
  

   of 
  the 
  intestine 
  and 
  ovary. 
  

  

  Sp. 
  Syntethys 
  hebridicus. 
  — 
  All 
  the 
  specimens 
  were 
  dredged 
  in 
  thirty 
  fathoms 
  

   water, 
  close 
  to 
  Croulin 
  Island, 
  near 
  Applecross. 
  The 
  locality 
  in 
  which 
  they 
  

   occurred 
  is 
  remarkable 
  for 
  the 
  assemblage 
  of 
  boreal 
  mollusca 
  there 
  congregated, 
  

   so 
  that 
  we 
  may 
  reasonably 
  expect 
  that 
  this 
  extraordinary 
  ascidian 
  will 
  be 
  found 
  

   hereafter 
  in 
  the 
  Norwegian 
  seas. 
  It 
  is 
  probably 
  a 
  member 
  of 
  the 
  boreal 
  type 
  of 
  

   the 
  British 
  fauna. 
  

  

  Holothuria 
  intestinalis. 
  Ascan. 
  and 
  Rathke. 
  — 
  From 
  a 
  depth 
  of 
  thirty 
  fathoms 
  

   in 
  the 
  Minch, 
  and 
  from 
  the 
  same 
  depth 
  off 
  Croulin 
  Island, 
  we 
  dredged 
  a 
  twenty- 
  

   tentaculated 
  Holothuria, 
  undescribed 
  as 
  a 
  member 
  of 
  the 
  British 
  fauna. 
  It 
  has 
  

   an 
  elongated 
  cylindrical 
  body 
  of 
  a 
  pinkish-grey 
  colour, 
  and 
  very 
  soft 
  in 
  texture 
  

   of 
  skin. 
  The 
  tentacula 
  are 
  short 
  and 
  orbicular, 
  compactly 
  frondose, 
  and 
  of 
  a 
  

   dark 
  orange 
  colour. 
  The 
  surface 
  of 
  the 
  body 
  is 
  thickly 
  covered 
  with 
  slender 
  

   suckers, 
  dilated 
  at 
  their 
  bases, 
  and 
  rather 
  more 
  numerous 
  on 
  the 
  ventral 
  than 
  on 
  

   the 
  dorsal 
  aspect. 
  By 
  means 
  of 
  these 
  suckers, 
  the 
  animal 
  invests 
  itself 
  with 
  

   fragments 
  of 
  shells 
  and 
  stones 
  in 
  the 
  manner 
  of 
  Thyone. 
  It 
  grows 
  to 
  the 
  length 
  of 
  

   half 
  a 
  foot. 
  Judging 
  from 
  the 
  description 
  given 
  in 
  the 
  " 
  Ofversigt 
  af 
  Skandina- 
  

   viens 
  Echinodermer," 
  by 
  Duben 
  and 
  Koren, 
  this 
  appears 
  to 
  be 
  the 
  Holothuria 
  

   intestinalis 
  of 
  Ascanius 
  and 
  Rathke, 
  H. 
  mollis 
  of 
  Sars. 
  We 
  have 
  not 
  been 
  able 
  

   to 
  compare 
  it 
  with 
  the 
  original 
  figures. 
  It 
  constitutes 
  a 
  second 
  British 
  species 
  of 
  

   Holothuria 
  proper 
  ; 
  the 
  first 
  being 
  the 
  animal 
  described 
  by 
  Mr 
  Peach, 
  under 
  the 
  

   name 
  of 
  " 
  Nigger," 
  given 
  to 
  it 
  by 
  the 
  Cornish 
  fishermen. 
  

  

  Sarcodictyon 
  agglomerata. 
  Sp. 
  nov. 
  — 
  Examples 
  of 
  a 
  new 
  species 
  of 
  this 
  curious 
  

   genus 
  of 
  Asteroid 
  zoophytes 
  were 
  dredged 
  in 
  thirty 
  fathoms 
  water 
  off 
  Croulin 
  

   Island, 
  and 
  also 
  between 
  Rasa 
  and 
  Scalpa. 
  

  

  Like 
  its 
  congener 
  the 
  Sarcodictyon 
  catenata, 
  it 
  invests 
  the 
  surface 
  of 
  stones 
  

   and 
  shells, 
  and 
  is 
  also 
  found 
  adhering 
  to 
  corallines. 
  It 
  differs 
  essentially, 
  how- 
  

   ever, 
  in 
  having 
  the 
  polype 
  cells, 
  instead 
  of 
  being 
  arranged 
  in 
  single 
  file, 
  grouped 
  

   together 
  in 
  assemblages 
  of 
  from 
  three 
  to 
  five, 
  each 
  group 
  connected 
  with 
  its 
  

   neighbour 
  by 
  a 
  stolon-like 
  extension 
  of 
  the 
  polypidom. 
  The 
  texture 
  of 
  its 
  surface 
  

   is 
  not 
  so 
  smooth, 
  and 
  the 
  colour 
  invariably 
  ochraceous 
  yellow. 
  The 
  polypes 
  are 
  

   white, 
  and 
  exactly 
  resemble 
  those 
  of 
  Sarcodictyon 
  catenata. 
  Each 
  polype 
  cell 
  

   measures 
  about 
  two-tenths 
  of 
  an 
  inch 
  across. 
  

  

  