﻿EPITHELIAL 
  ISLETS 
  Oi' 
  THE 
  PANCREAS 
  IN 
  TELEOSTEI. 
  381 
  

  

  this 
  group. 
  This 
  is 
  all 
  the 
  more 
  probable 
  since 
  they 
  appear 
  

   to 
  possess 
  some 
  functional 
  activity. 
  

  

  As 
  a 
  result 
  of 
  pursuing 
  specially 
  the 
  study 
  of 
  the 
  con- 
  

   ditions 
  in 
  bony 
  fishes, 
  I 
  have, 
  inter 
  alia, 
  discovered 
  the 
  

   existence 
  of 
  a 
  "principal 
  islet 
  " 
  (15). 
  This 
  has 
  enabled 
  me 
  

   to 
  offer 
  a 
  fresh 
  suggestion 
  as 
  to 
  the 
  possible 
  phylogenetic 
  

   significance 
  of 
  these 
  bodies 
  in 
  higher 
  animals. 
  I 
  have, 
  further, 
  

   been 
  able 
  to 
  confirm 
  the 
  opinion 
  of 
  Massari, 
  Diamare, 
  and 
  

   others 
  regarding 
  them 
  as 
  ductless 
  glands 
  with 
  internal 
  secre- 
  

   tory 
  function, 
  and 
  also 
  to 
  test 
  experimentally 
  the 
  theory 
  that 
  

   derangement 
  of 
  the 
  function 
  of 
  these 
  bodies 
  leads 
  to 
  diabetes. 
  

   A 
  record 
  of 
  these 
  experiments, 
  which 
  are 
  still 
  in 
  pi'ogress, 
  

   will 
  appear 
  later. 
  

  

  Names 
  and 
  Systematic 
  Arrangement 
  of 
  the 
  

   Species 
  Examined. 
  

  

  Teleostei. 
  

  

  Physostomi 
  : 
  

  

  Cyprinidas 
  — 
  Cyprinus 
  carpio. 
  

   Physoclysti 
  : 
  

  

  Acanthopteri 
  : 
  

  

  Scombriformes 
  — 
  Zeus 
  faber, 
  Agonus 
  cata- 
  

   phractus, 
  Lophius 
  pisca- 
  

   torius, 
  Cottus 
  scorpius. 
  

   Gobiiformes 
  — 
  Cyclopterus 
  lumpus, 
  Callio- 
  

   nymus 
  lyra, 
  Cyclogaster 
  

   Montagui. 
  

   Bleniiformos 
  — 
  Anarrhichas 
  lupus, 
  Zoarces 
  

   viviparus, 
  Pholis 
  gunnel- 
  

   lus, 
  Chirolophis 
  galerita. 
  

   Anacanthini 
  : 
  

  

  Gadidte 
  — 
  Gadus 
  virens, 
  G. 
  Eeglifinus, 
  etc., 
  

  

  Onos 
  mustela. 
  

   Ophidiidae 
  — 
  Ammodytes 
  tobianus. 
  

   Pleuronectidee 
  — 
  Hippoglossus 
  vulgaris, 
  

  

  Pleuronectes 
  platessa, 
  etc. 
  

  

  