﻿26 
  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM 
  voi,. 
  98 
  

  

  Genus 
  TROPIDOSTETHUS 
  Ogilby 
  

  

  Tropidostethus 
  Ogizbt, 
  Proc. 
  Linn. 
  Soc. 
  New 
  South 
  Wales, 
  vol. 
  10, 
  p. 
  332, 
  1895 
  

   (genotype 
  : 
  Tropidostethus 
  rhuthophilus 
  Ogilby, 
  from 
  Maroubra 
  Day, 
  

   Australia). 
  

  

  The 
  generic 
  diagnosis 
  is 
  based 
  on 
  three 
  cotypes, 
  U. 
  S. 
  N. 
  M. 
  No. 
  

   48830, 
  from 
  Maroubra 
  Bay 
  and 
  on 
  another 
  lot 
  of 
  the 
  genotype 
  sent 
  to 
  

   the 
  National 
  Museum 
  by 
  Dr. 
  Ogilby 
  in 
  1894 
  and 
  now 
  bearing 
  the 
  num- 
  

   ber 
  45554. 
  These 
  latter 
  specimens 
  are 
  in 
  an 
  excellent 
  state 
  of 
  preserva- 
  

   tion 
  and 
  bore 
  an 
  unpublished 
  manuscript 
  name 
  by 
  Ogilby, 
  which 
  I 
  

   have 
  removed 
  from 
  the 
  jar. 
  It 
  is 
  highly 
  probable 
  that 
  this 
  is 
  part 
  of 
  

   the 
  collection 
  used 
  by 
  Ogilby 
  in 
  describing 
  Tropidostethus 
  rhotho- 
  

   philus. 
  One 
  of 
  the 
  specimens 
  had 
  14+28 
  vertebrae. 
  

  

  Dr. 
  A. 
  W. 
  C. 
  T. 
  Herre 
  (Proc. 
  Biol. 
  Soc. 
  Washington, 
  vol. 
  57, 
  pp. 
  

   46-47, 
  1944) 
  recently 
  described 
  as 
  new 
  I 
  so 
  flos-indicus 
  from 
  India. 
  On 
  

   exchange 
  Dr. 
  Herre 
  kindly 
  sent 
  four 
  paratypes 
  to 
  the 
  National 
  

   Museum 
  (No. 
  123651) 
  , 
  one 
  of 
  which 
  has 
  15 
  + 
  25 
  vertebrae. 
  A 
  study 
  of 
  

   these 
  indicates 
  that 
  they 
  belong 
  to 
  Tropidostethus, 
  along 
  with 
  

   rhothophilus 
  Ogilby 
  and 
  natdlensis 
  Regan. 
  Dr. 
  J. 
  L. 
  B. 
  Smith 
  (Rec. 
  

   Albany 
  Mus. 
  South 
  Africa, 
  vol. 
  4, 
  pt. 
  2, 
  pp. 
  178-180, 
  pi. 
  19, 
  fig. 
  c, 
  1935) 
  

   gives 
  a 
  beautiful 
  figure 
  and 
  good 
  description 
  of 
  natdlensis 
  Regan, 
  and 
  

   without 
  hesitation 
  I 
  refer 
  it 
  to 
  this 
  genus. 
  

  

  Genus 
  ISO 
  Jordan 
  and 
  Starks 
  

  

  Iso 
  Jordan 
  and 
  Starks, 
  Proc. 
  U. 
  S. 
  Nat. 
  Mus., 
  vol. 
  24, 
  p. 
  204, 
  fig. 
  4, 
  1901 
  (genotype. 
  

   Iso 
  flos-maris 
  Jordan 
  and 
  Starks, 
  from 
  Japan). 
  

  

  The 
  generic 
  diagnosis 
  is 
  based 
  on 
  three 
  paratypes 
  of 
  /. 
  flos-maris, 
  

   U. 
  S. 
  N. 
  M. 
  No. 
  49817. 
  Since 
  specimens 
  of 
  the 
  three 
  genera 
  recognized 
  

   tinder 
  this 
  subfamily 
  are 
  so 
  scarce, 
  I 
  have 
  made 
  but 
  a 
  single 
  vertebral 
  

   count 
  on 
  the 
  genotype 
  of 
  each 
  genus. 
  The 
  three 
  paratypes 
  of 
  /. 
  flos- 
  

   maris 
  were 
  in 
  a 
  poor 
  state 
  of 
  preservation, 
  having 
  been 
  partially 
  dried 
  

   at 
  some 
  time 
  in 
  the 
  past. 
  One 
  of 
  these 
  has 
  18 
  + 
  26 
  vertebrae. 
  

  

  Menidiinae, 
  new 
  subfamily 
  

  

  Now 
  that 
  the 
  Atherinopsinae 
  have 
  been 
  restricted 
  to 
  include 
  those 
  

   silversides 
  with 
  concave 
  gape 
  of 
  mouth 
  and 
  with 
  the 
  air 
  bladder 
  taper- 
  

   ing 
  to 
  a 
  point 
  posteriorly, 
  and 
  entering 
  several 
  modified 
  haemal 
  arches 
  

   or 
  terminating 
  opposite 
  modified 
  vertebral 
  hypophyses, 
  there 
  remains 
  

   a 
  group 
  of 
  genera 
  more 
  or 
  less 
  centering 
  around 
  Menidia. 
  As 
  here 
  

   defined 
  the 
  new 
  subfamily 
  Menidiinae 
  contains 
  those 
  silversides 
  with 
  

   concave 
  gape 
  of 
  mouth 
  ; 
  air 
  bladder 
  or 
  body 
  cavity 
  ending 
  abruptly, 
  

   not 
  extending 
  into 
  the 
  haemal 
  arches; 
  and 
  caudal 
  vertebrae 
  without 
  

   modified 
  haemal 
  arches 
  or 
  broadened 
  haemal 
  hypophyses. 
  The 
  body 
  

   cavity 
  in 
  certain 
  genera 
  does 
  not 
  quite 
  reach 
  to 
  opposite 
  the 
  anal 
  

  

  