﻿SIX 
  SUBFAMILIES 
  OF 
  ATHERINIDAE 
  — 
  SCHULTZ 
  33 
  

  

  Pohlana 
  appears 
  to 
  be 
  closely 
  related 
  to 
  Menidia 
  on 
  the 
  basis 
  of 
  the 
  

   extension 
  of 
  the 
  body 
  cavity 
  backward 
  to 
  over 
  first 
  few 
  rays 
  of 
  anal 
  

   fin, 
  and 
  the 
  elongate, 
  spinelike 
  ascending 
  process 
  on 
  the 
  premaxillary 
  

   among 
  other 
  characters. 
  

  

  The 
  absence 
  of 
  scales 
  anteriorly 
  on 
  the 
  head 
  and 
  body 
  may 
  not 
  be 
  of 
  

   much 
  importance 
  in 
  determining 
  relationships 
  since 
  the 
  condition 
  

   occurs 
  in 
  four 
  other 
  phyletic 
  lines 
  in 
  the 
  family 
  Atherinidae: 
  

   XenatheHna, 
  Alepidoimis, 
  Tropidostethus^ 
  and 
  Iso. 
  In 
  the 
  first 
  the 
  

   ascending 
  premaxillary 
  processes 
  are 
  broad-based 
  triangular 
  plates. 
  

   The 
  last 
  three 
  genera 
  are 
  in 
  other 
  subfamilies. 
  

  

  MENIDIELLA, 
  new 
  genus 
  

  

  Genotype. 
  — 
  Menidia 
  colei 
  Hubbs, 
  Carnegie 
  Inst. 
  Washington 
  

   Publ. 
  No. 
  457, 
  p. 
  248, 
  pi. 
  10, 
  fig. 
  1, 
  1936. 
  

  

  This 
  new 
  genus 
  is 
  related 
  to 
  Menidia 
  but 
  differs 
  in 
  being 
  shorter 
  

   and 
  deeper 
  bodied, 
  with 
  about 
  14+18 
  vertebrae 
  instead 
  of 
  about 
  18 
  

   or 
  19 
  + 
  19 
  to 
  26 
  as 
  in 
  Menidia. 
  In 
  addition, 
  the 
  base 
  of 
  the 
  anal 
  fin 
  is 
  

   shorter, 
  and 
  there 
  are 
  fewer 
  anal 
  fin 
  rays 
  than 
  in 
  Menidia. 
  M. 
  

   heryllina 
  approaches 
  in 
  shape 
  of 
  body 
  that 
  of 
  Menidiella, 
  closest 
  of 
  

   the 
  species 
  referred 
  to 
  the 
  genus 
  Menidia, 
  but 
  the 
  air 
  bladder 
  or 
  body 
  

   cavity 
  of 
  M. 
  heryllina 
  extends 
  notably 
  past 
  the 
  anal-fin 
  origin, 
  where- 
  

   as 
  in 
  Menidiella 
  colei 
  the 
  body 
  cavity 
  reaches 
  just 
  to 
  the 
  anal-fin 
  

   origin. 
  

  

  This 
  new 
  genus 
  may 
  be 
  separated 
  from 
  all 
  other 
  related 
  genera 
  of 
  

   Atherinidae 
  by 
  the 
  characters 
  given 
  in 
  my 
  key. 
  

  

  For 
  the 
  generic 
  description 
  three 
  paratypes 
  of 
  Menidia 
  colei 
  

   Hubbs, 
  U. 
  S. 
  N. 
  M, 
  No. 
  117556, 
  and 
  the 
  holotype 
  of 
  Menidia 
  coich- 
  

   orum 
  Hildebrand 
  and 
  Ginsburg, 
  U. 
  S. 
  N. 
  M. 
  No. 
  87535, 
  were 
  used. 
  

  

  XENOMELANIRIS, 
  new 
  genus 
  

   Figures 
  4c, 
  5& 
  

  

  Genotype. 
  — 
  Atherina 
  hrasiliensis 
  Quoy 
  and 
  Gaimard. 
  

  

  The 
  generic 
  diagnosis 
  of 
  this 
  new 
  genus 
  given 
  in 
  my 
  key 
  was 
  based 
  

   on 
  the 
  following 
  specimens 
  of 
  X. 
  hrasilietisis 
  in 
  the 
  collections 
  of 
  the 
  

   United 
  States 
  National 
  Museum: 
  From 
  Brazil, 
  Nos. 
  83149, 
  100874, 
  

   100901, 
  and 
  104220, 
  totaling 
  11 
  specimens; 
  from 
  Trinidad, 
  No. 
  5794, 
  

   one 
  specimen; 
  from 
  Venezuela, 
  Nos. 
  121821, 
  121822, 
  and 
  123204, 
  total- 
  

   ing 
  13 
  specimens. 
  

  

  In 
  addition 
  to 
  the 
  genotype, 
  Menidia 
  venezuelae 
  Eigenmann 
  be- 
  

   longs 
  to 
  this 
  genus. 
  I 
  have 
  examined 
  five 
  specimens, 
  25.5 
  to 
  33.5 
  

   mm., 
  from 
  Lago 
  de 
  Valencia 
  collected 
  by 
  Dr. 
  F. 
  F. 
  Bond 
  and 
  lent 
  me 
  

   for 
  study 
  and 
  report 
  by 
  Dr. 
  R. 
  M. 
  Bailey, 
  University 
  of 
  Michigan. 
  

  

  763520—48 
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