﻿28 
  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM 
  vol. 
  98 
  

  

  of 
  A. 
  sallei 
  reported 
  upon 
  by 
  Jordan 
  and 
  Hubbs, 
  from 
  Rio 
  Hueyopam, 
  

   San 
  Juan, 
  Acayucan, 
  Mexico. 
  These 
  three 
  specimens, 
  now 
  comprising 
  

   U. 
  S. 
  N. 
  M. 
  No. 
  123^'08, 
  were 
  kindly 
  sent 
  to 
  me 
  from 
  the 
  original 
  lot 
  

   by 
  Dr. 
  E. 
  M. 
  Bailey, 
  University 
  of 
  Michigan. 
  

  

  Genus 
  XENATHERINA 
  Regan 
  

  

  Xenatherina 
  Regan, 
  Biologia 
  Contrali-Americana, 
  Pisces, 
  p. 
  &4, 
  1907 
  (genotype: 
  

   Menidia 
  lisa 
  Meek). 
  

  

  The 
  generic 
  diagnosis 
  given 
  in 
  the 
  key 
  is 
  based 
  on 
  10 
  paratypes, 
  

   U. 
  S. 
  N. 
  M. 
  Nos. 
  55851 
  and 
  82178, 
  of 
  Menidia 
  lisa 
  Meek 
  from 
  Refugio, 
  

   Veracruz, 
  Mexico. 
  

  

  Genus 
  LABIDESTHES 
  Cope 
  

  

  FiGUEE 
  4& 
  

  

  Lahidesthes 
  Cope, 
  Proc. 
  Amer. 
  I'hilos. 
  Soc, 
  vol. 
  11, 
  p. 
  455, 
  1870 
  (gentotype: 
  Chiro- 
  

   stoma 
  sicculum 
  Cope) 
  . 
  

  

  The 
  generic 
  diagnosis 
  is 
  based 
  on 
  very 
  numerous 
  specimens 
  of 
  L. 
  

   sicculus 
  Cope, 
  in 
  so 
  many 
  lots 
  from 
  Eastern 
  North 
  America 
  that 
  it 
  is 
  

   not 
  practical 
  to 
  list 
  the 
  U. 
  S. 
  N. 
  M. 
  numbers 
  here. 
  In 
  addition, 
  the 
  type 
  

   and 
  paratypes 
  of 
  L. 
  vanhyningi 
  were 
  examined, 
  U. 
  S. 
  N. 
  M. 
  Nos. 
  88485 
  

   and 
  88486, 
  respectively. 
  

  

  Genus 
  ATHERINELLA 
  Steindachner 
  

  

  Atherinella 
  Steindachner, 
  Sitz. 
  Akad. 
  Wiss. 
  Wien, 
  vol. 
  71, 
  p. 
  477 
  (p. 
  35 
  in 
  reprint, 
  

   Ichth. 
  Beitriige 
  No. 
  2), 
  1875 
  (genotype 
  : 
  Ather'meUa 
  panamensis 
  Stein- 
  

   dachner). 
  

  

  The 
  generic 
  diagnosis 
  given 
  in 
  the 
  key 
  was 
  taken 
  from 
  Steindach- 
  

   ner's 
  description 
  supplemented 
  by 
  that 
  of 
  Gilbert 
  and 
  Starks 
  (Mem. 
  

   California 
  Acad. 
  Sci., 
  vol. 
  4, 
  p. 
  69, 
  pi. 
  9, 
  fig. 
  17, 
  1904) 
  . 
  Only 
  the 
  geno- 
  

   type 
  is 
  known. 
  I 
  have 
  not 
  seen 
  a 
  specimen 
  of 
  A. 
  panamensis. 
  

  

  Genus 
  THYRINOPS 
  Hubbs 
  

  

  Thyrinops 
  Hubbs, 
  Proc. 
  Acad. 
  Nat. 
  Sci. 
  Philadelphia, 
  vol. 
  69, 
  p. 
  306, 
  1918 
  (geno- 
  

   type: 
  Atherinichthys 
  pachylepis 
  Giinther). 
  

  

  Thyrina 
  Jokdan 
  and 
  Culvek, 
  in 
  Jordan, 
  Proc. 
  California 
  Acad. 
  Sci., 
  ser. 
  2, 
  vol. 
  5, 
  

   p. 
  419, 
  1895 
  (genotype: 
  Thyrina 
  evermanni 
  Jordan 
  and 
  Culver) 
  (preoc- 
  

   cupied). 
  

  

  The 
  generic 
  diagnosis 
  given 
  in 
  the 
  key 
  was 
  based 
  on 
  numerous 
  lots 
  of 
  

   2\ 
  pachylepis 
  Giinther, 
  from 
  the 
  Pacific 
  side 
  of 
  Central 
  America. 
  

   These 
  lots 
  are 
  too 
  numerous 
  to 
  list 
  the 
  National 
  Museum 
  catalog 
  num- 
  

   bers. 
  In 
  addition, 
  I 
  have 
  examined 
  the 
  holotype 
  and 
  paratypes 
  of 
  the 
  

   following 
  species 
  and 
  refer 
  them 
  to 
  this 
  genus 
  : 
  

  

  Thyrina 
  guija 
  Hildebrand, 
  holotype, 
  U. 
  S. 
  N. 
  M. 
  No. 
  87273, 
  and 
  paratypes, 
  

  

  U. 
  S. 
  N. 
  M. 
  Nos. 
  87274-87277. 
  

   Menidia 
  chagresi 
  Meek 
  and 
  Hildebrand, 
  types, 
  U. 
  S. 
  N. 
  M. 
  Nos. 
  79726 
  and 
  79728, 
  

  

  and 
  lectotype, 
  U. 
  S. 
  N. 
  M. 
  No. 
  81761. 
  

  

  