﻿Sijstematic 
  Arrangement 
  of 
  the 
  Family 
  Salmoiiidse. 
  405 
  

  

  This 
  remarkable 
  insect 
  bears 
  a 
  MS. 
  name 
  of 
  P. 
  Cameron's, 
  

   ^^Prosopis 
  papuana.'^ 
  It 
  is 
  greatly 
  to 
  be 
  regretted 
  that 
  the 
  

   2 
  of 
  this 
  species 
  is 
  unknown, 
  since 
  we 
  are 
  still 
  in 
  ignorance 
  

   as 
  to 
  whether 
  the 
  tongue 
  is 
  short 
  and 
  blunt 
  as 
  in 
  that 
  sex 
  of 
  

   PaheorJu'za 
  and 
  both 
  sexes 
  of 
  Prosopi's, 
  &c.) 
  or 
  acute 
  as 
  in 
  

   the 
  c? 
  here 
  described. 
  

  

  XLYI. 
  — 
  T/ie 
  St/fiteniallo 
  Arrang 
  meat 
  of 
  the 
  Fishes 
  of 
  the 
  

   Fuming 
  Salinonidai. 
  By 
  C. 
  Tate 
  Kegan, 
  M.A. 
  

  

  (Publislied 
  by 
  permission 
  of 
  the 
  Trustees 
  of 
  the 
  British 
  Museum.) 
  

  

  In 
  a 
  recent 
  synopsis 
  of 
  the 
  families 
  of 
  Salmonoid 
  fishes 
  

   (Trans. 
  R. 
  Soc. 
  Edinburgh, 
  xlix. 
  1913, 
  p. 
  289) 
  I 
  have 
  shown 
  

   that 
  the 
  SahnonidaJ 
  are 
  well 
  distinguished 
  from 
  the 
  Smelts 
  

   (Osmeridsej, 
  Sil-smelts 
  (Argentinida?), 
  &c., 
  by 
  osteological 
  

   characters 
  ; 
  perhaps 
  the 
  most 
  noticeable 
  of 
  these 
  is 
  that 
  the 
  

   vertebree 
  turn 
  upwards 
  at 
  the 
  base 
  of 
  the 
  caudal 
  fin 
  in 
  the 
  

   Salmonidai, 
  but 
  in 
  no 
  other 
  Salmonoids. 
  As 
  thus 
  restricted 
  

   they 
  form 
  a 
  natural 
  group, 
  confined 
  to 
  the 
  coasts 
  and 
  rivers 
  

   of 
  the 
  Arctic 
  and 
  North 
  Temperate 
  zones. 
  

  

  After 
  a 
  study 
  of 
  a 
  large 
  series 
  of 
  skeletons, 
  I 
  have 
  arrived 
  

   at 
  certain 
  conclusions 
  as 
  to 
  t!ie 
  number 
  of 
  genera 
  that 
  may 
  

   be 
  defined, 
  and 
  as 
  to 
  their 
  natural 
  affiuities, 
  which 
  are 
  

   embodied 
  in 
  the 
  following 
  synopsis 
  : 
  — 
  ■ 
  

  

  Synopsis 
  of 
  the 
  Genera. 
  

  

  I. 
  Parietals 
  not 
  meeting- 
  in 
  middle 
  line. 
  Teeth 
  well 
  developed 
  in 
  jaws, 
  

   on 
  vomer 
  and 
  palatines, 
  and 
  in 
  a 
  double 
  series 
  on 
  tongue. 
  Scales 
  

   small 
  19 
  or 
  more 
  in 
  a 
  transverse 
  series 
  from 
  origin 
  of 
  dorsal 
  fin 
  

   to 
  lateral 
  line. 
  Dorsal 
  tin 
  short, 
  with 
  not 
  more 
  than 
  16 
  rays, 
  12 
  

   or 
  fewer 
  branched. 
  (Salmonmce.) 
  

  

  A. 
  A 
  double 
  or 
  zigzag 
  series 
  of 
  teeth 
  along 
  shaft 
  of 
  vomer, 
  some- 
  

  

  times 
  deciduous 
  in 
  the 
  adult 
  .... 
  1. 
  Salino, 
  Linn. 
  

  

  B. 
  Teeth 
  only 
  on 
  head 
  of 
  vomer, 
  which 
  has 
  a 
  boat-shaped 
  depression 
  

  

  behind 
  it. 
  

  

  Vomerine 
  teeth 
  in 
  a 
  V-shaped 
  or 
  Y-shaped 
  

  

  oTOup, 
  separated 
  from 
  the 
  palatine 
  teeth. 
  2. 
  Salvelinus, 
  Nilss. 
  

  

  Vomerine 
  teeth 
  in 
  a 
  curved, 
  nearly 
  semi- 
  

   circular 
  series 
  that 
  connects 
  the 
  pala- 
  

   tine 
  series; 
  mouth 
  large 
  ; 
  teeth 
  strong. 
  3. 
  Hucho, 
  Giinth. 
  

  

  Vomerine 
  teeth 
  in 
  a 
  transverse 
  series 
  that 
  

   connects 
  the 
  palatine 
  series; 
  mouth 
  

   rather 
  small; 
  teeth 
  rather 
  weak 
  .... 
  4. 
  Bruchi/ini/stax, 
  Gimih. 
  

  

  