﻿Bibliographical 
  Notice. 
  153 
  

  

  structure 
  of 
  the 
  animals, 
  which 
  were 
  obtained 
  by 
  deep 
  dredging 
  at 
  

   four 
  different 
  stations, 
  is 
  described 
  at 
  some 
  length 
  by 
  Dr. 
  Dauielssen, 
  

   and 
  pretty 
  fully 
  illustrated 
  on 
  three 
  quarto 
  plates. 
  

  

  The 
  two 
  new 
  Cornulariae 
  from 
  the 
  Norwegian 
  coast 
  described 
  by 
  

   Mr. 
  James 
  A. 
  Grieg 
  in 
  the 
  second 
  article 
  can 
  make 
  no 
  claim 
  to 
  the 
  

   somewhat 
  romantic 
  interest 
  attaching 
  to 
  Dr. 
  Danielssen's 
  Actinida, 
  

   although 
  they 
  also 
  form 
  part 
  of 
  the 
  spoils 
  of 
  the 
  North-Atlantic 
  

   Expedition. 
  They 
  are 
  unmistakablo 
  Alcyonarians 
  belonging 
  to 
  

   known 
  genera, 
  namely 
  Rhizoocenia 
  alba 
  and 
  Sympodium 
  margari- 
  

   taceum, 
  and 
  they 
  are 
  carefully 
  described 
  and 
  well 
  figured. 
  Short 
  

   characters 
  and 
  an 
  explanation 
  of 
  the 
  two 
  plates 
  are 
  given 
  in 
  

   English. 
  

  

  Mr. 
  Grieg 
  also 
  publishes 
  the 
  first 
  of 
  a 
  projected 
  series 
  of 
  articles 
  

   on 
  the 
  fauna 
  of 
  the 
  Westland 
  fjords, 
  in 
  which 
  he 
  deals 
  with 
  the 
  

   animal 
  life 
  of 
  the 
  Mosterfjord, 
  and 
  gives 
  lists 
  of 
  the 
  Mollusca, 
  Tuni- 
  

   cata, 
  and 
  Ccelenterata 
  which 
  have 
  been 
  ascertained 
  to 
  inhabit 
  that 
  

   locality. 
  He 
  indicates 
  the 
  rarity 
  or 
  abundance 
  of 
  the 
  different 
  

   species 
  and 
  has 
  remarks 
  upon 
  their 
  mode 
  of 
  occurrence. 
  The 
  Pori- 
  

   fera 
  are 
  noticed 
  as 
  Ccelenterata. 
  

  

  The 
  last 
  article 
  in 
  the 
  volume, 
  written, 
  like 
  the 
  first, 
  in 
  English, 
  

   shares 
  with 
  it 
  in 
  zoological 
  interest, 
  and 
  bears 
  the 
  following 
  title 
  : 
  — 
  

   " 
  A 
  Protandric 
  Hermaphrodite 
  (Myxine 
  glutinosa, 
  L.) 
  amongst 
  the 
  

   Vertebrates." 
  The 
  author, 
  Dr. 
  Eridrjof 
  Nansen, 
  Curator 
  of 
  the 
  

   Eergen 
  Museum, 
  describes 
  the 
  circumstances 
  which 
  led 
  him 
  to 
  the 
  

   conclusion 
  that 
  the 
  hagfish 
  is 
  a 
  protandric 
  hermaphrodite, 
  and 
  goes 
  

   in 
  some 
  detail 
  into 
  a 
  discussion 
  of 
  the 
  phenomena 
  of 
  reproduction 
  in 
  

   the 
  Myxine. 
  His 
  conclusions 
  are 
  summarized 
  as 
  follows 
  : 
  — 
  

  

  " 
  1. 
  Myxine 
  glutinosa 
  is 
  a 
  protandric 
  hermaphrodite. 
  Up 
  to 
  a 
  

   body-length 
  of 
  about 
  32 
  or 
  33 
  centimetres 
  it 
  is 
  a 
  male, 
  after 
  that 
  

   time 
  it 
  produces 
  ova. 
  

  

  " 
  2. 
  The 
  proportion 
  between 
  the 
  posterior 
  male 
  portion 
  of 
  the 
  

   reproductive 
  organ 
  and 
  the 
  anterior 
  female 
  portion 
  is 
  not 
  constant 
  : 
  

   the 
  male 
  portion 
  is 
  generally, 
  however, 
  about 
  one 
  third 
  of 
  the 
  whole 
  

   length 
  of 
  the 
  organ. 
  

  

  " 
  3. 
  The 
  few 
  " 
  true 
  " 
  males 
  of 
  Myxine 
  observed 
  are 
  probably 
  

   transformed 
  hermaphrodites. 
  

  

  " 
  4. 
  The 
  young 
  testicular 
  follicles 
  or 
  capsules 
  have 
  a 
  structure 
  

   quite 
  similar 
  to 
  that 
  of 
  the 
  young 
  ovarian 
  follicles. 
  They 
  contain 
  a 
  

   large 
  sexual 
  cell, 
  sperniatogon, 
  which 
  is 
  enveloped 
  by 
  an 
  epithelium, 
  

   follicular 
  epithelium, 
  and 
  a 
  connective-tissue 
  envelope. 
  

  

  " 
  5. 
  The 
  spermatogon 
  is, 
  by 
  subdivision, 
  converted 
  into 
  sperma- 
  

   tides, 
  which 
  are 
  separated 
  from 
  each 
  other 
  and 
  swim 
  in 
  a 
  fluid 
  inside 
  

   the 
  testicular 
  capsules. 
  By 
  gradual 
  elongation 
  of 
  the 
  nucleus, 
  as 
  

   well 
  as 
  the 
  whole 
  cell, 
  the 
  spermatides 
  are 
  converted 
  into 
  ripe 
  sper- 
  

   matozoa, 
  which 
  pass 
  into 
  the 
  body-cavity 
  when 
  the 
  testicular 
  cap- 
  

   sules 
  burst. 
  

  

  •• 
  6. 
  Nearly 
  ripe 
  spermatozoa 
  may 
  be 
  found 
  in 
  specimens 
  of 
  

   Ali/winc 
  at 
  every 
  season 
  of 
  the 
  year. 
  

  

  " 
  7. 
  Myxine 
  deposits 
  its 
  ova 
  at 
  every 
  season 
  of 
  the 
  year." 
  

  

  Ann. 
  & 
  Mag. 
  N. 
  Hist. 
  Ser. 
  6, 
  Vol. 
  iii. 
  11 
  

  

  