﻿384 
  JOHN 
  RENNIE. 
  

  

  relations 
  are 
  very 
  similar 
  to 
  those 
  described 
  for 
  Cottus 
  

   SCO 
  r 
  pi 
  us. 
  It 
  is 
  very 
  pale 
  and 
  of 
  relatively 
  large 
  size; 
  in 
  

   large 
  specimens 
  it 
  is 
  about 
  1 
  cm. 
  in 
  length. 
  The 
  amount 
  

   of 
  pancreatic 
  tissue 
  around 
  it 
  is 
  very 
  slight. 
  

  

  Callionymus 
  lyra. 
  — 
  Several 
  islets 
  have 
  been 
  observed 
  

   in 
  this 
  species^ 
  the 
  largest 
  — 
  tbe 
  principal 
  — 
  lying 
  close 
  to 
  the 
  

   portal 
  vein 
  on 
  the 
  right 
  side 
  of 
  the 
  fish 
  where 
  that 
  vessel 
  

   enters 
  the 
  liver. 
  As 
  in 
  other 
  cases, 
  it 
  is 
  slightly 
  anterior 
  to 
  

   the 
  spleen, 
  and 
  in 
  the 
  same 
  portion 
  of 
  the 
  mesentery. 
  The 
  

   others 
  are 
  all 
  in 
  the 
  same 
  region, 
  but 
  lie 
  nearer 
  the 
  intestine; 
  

   they 
  are 
  whitish 
  in 
  appearance 
  and 
  very 
  small. 
  

  

  Auarrhichas 
  lupus. 
  — 
  Besides 
  a 
  principal 
  islet, 
  several 
  

   others 
  — 
  never 
  a 
  large 
  number 
  — 
  have 
  been 
  observed 
  in 
  the 
  

   anterior 
  region 
  of 
  the 
  abdominal 
  cavity. 
  Except 
  in 
  the 
  case 
  

   of 
  the 
  principal, 
  constantly 
  occurring 
  forms 
  or 
  large 
  

   examples 
  were 
  not 
  made 
  out. 
  The 
  principal 
  is 
  usually 
  

   ovoid 
  in 
  shape 
  ; 
  in 
  specimens 
  of 
  about 
  40 
  cm. 
  its 
  longest 
  

   diameter 
  is 
  9 
  mm. 
  It 
  is 
  usually 
  of 
  a 
  pale 
  red 
  colour, 
  

   and 
  lies 
  in 
  a 
  thin 
  sheet 
  ot 
  pancreas 
  in 
  a 
  portion 
  of 
  the 
  

   mesentery 
  well 
  forward 
  under 
  the 
  right 
  lobe 
  of 
  the 
  liver, 
  

   and 
  quite 
  close 
  to 
  the 
  mesenteric 
  artery, 
  from 
  which 
  vessel 
  

   it 
  is 
  very 
  easily 
  injected. 
  

  

  Pholis 
  gunnellus. 
  — 
  The 
  situation 
  of 
  the 
  principal 
  islet 
  

   in 
  this 
  species 
  has 
  already 
  been 
  indicated 
  in 
  my 
  preliminary 
  

   note. 
  Further, 
  in 
  sections 
  of 
  the 
  abdominal 
  viscera 
  in 
  this 
  

   region 
  may 
  be 
  seen 
  a 
  fair-sized 
  islet 
  close 
  to 
  the 
  intestine 
  

   at 
  the 
  pylorus, 
  a 
  common 
  position 
  for 
  these 
  bodies. 
  

  

  Chirolophis 
  galerita. 
  — 
  In 
  a 
  position 
  very 
  similar 
  to 
  that 
  

   of 
  the 
  principal 
  islet 
  in 
  Pholis 
  there 
  is 
  an 
  islet 
  in 
  this 
  

   species. 
  Only 
  two 
  examples 
  were 
  examined, 
  and 
  it 
  was 
  

   found 
  in 
  both. 
  It 
  is 
  well 
  forward 
  under 
  the 
  right 
  lobe 
  of 
  the 
  

   liver, 
  between 
  it 
  and 
  the 
  stomach, 
  near 
  the 
  portal 
  vein. 
  It 
  

   was 
  found 
  oval 
  in 
  form, 
  enclosed 
  in 
  a 
  firm 
  capsule, 
  and 
  was 
  

   easily 
  separated 
  from 
  the 
  surrounding 
  tissue. 
  In 
  a 
  specimen 
  

   15 
  cm. 
  long 
  it 
  measured 
  2 
  mm. 
  

  

  Gad 
  us 
  virens. 
  — 
  Islets 
  are 
  situated 
  in 
  the 
  intercsecal 
  

   pancreatic 
  tissue. 
  They 
  do 
  not 
  appear 
  to 
  be 
  very 
  numerous, 
  

  

  