﻿362 
  Mr. 
  O. 
  Thomas 
  on 
  a 
  new 
  

  

  Asiatic 
  fauna, 
  in 
  the 
  Issik 
  Kul 
  or 
  one 
  of 
  its 
  affluents. 
  This 
  

   is 
  the 
  fourth 
  species 
  known 
  at 
  present 
  of 
  this 
  genus. 
  

  

  Diptychus 
  Lansdelli. 
  

   I). 
  11. 
  A. 
  7. 
  P. 
  18. 
  V. 
  10. 
  L. 
  lat. 
  80-90. 
  

  

  Nearly 
  the 
  whole 
  body 
  is 
  naked, 
  the 
  parts 
  above 
  the 
  lateral 
  

   line 
  being 
  quite 
  scaleless 
  ; 
  but 
  there 
  are 
  a 
  few 
  scales 
  between 
  

   the 
  lateral 
  line 
  and 
  the 
  root 
  of 
  the 
  pectoral 
  fin, 
  a 
  few 
  scattered 
  

   scales 
  on 
  the 
  abdomen, 
  and 
  a 
  series 
  of 
  larger 
  ones 
  running 
  on 
  

   each 
  side, 
  of 
  the 
  vent 
  and 
  the 
  anal 
  tin. 
  The 
  scales 
  of 
  the 
  lateral 
  

   line 
  are 
  distinct 
  enough 
  in 
  its 
  anterior 
  part, 
  but 
  rudimentary 
  

   behind. 
  

  

  The 
  body 
  is 
  low, 
  loach-like, 
  its 
  greatest 
  depth 
  being 
  only 
  

   one 
  sixth 
  or 
  nearly 
  one 
  sixth 
  of 
  the 
  total 
  length 
  (without 
  

   caudal) 
  ; 
  the 
  length 
  of 
  the 
  head 
  is 
  contained 
  four 
  times 
  and 
  a 
  

   quarter 
  in 
  it 
  and 
  exceeds 
  the 
  length 
  of 
  the 
  caudal 
  peduncle. 
  

   Interorbital 
  space 
  very 
  broad, 
  its 
  width 
  being 
  equal 
  to 
  the 
  

   length 
  of 
  the 
  snout. 
  The 
  diameter 
  of 
  the 
  eye 
  is 
  one 
  sixth 
  of 
  

   the 
  length 
  of 
  the 
  head 
  and 
  rather 
  less 
  than 
  two 
  thirds 
  of 
  thai 
  

   of 
  the 
  snout. 
  Mouth 
  semicircular, 
  quite 
  at 
  the 
  lower 
  side 
  of 
  

   the 
  snout. 
  Barbel 
  about 
  as 
  long 
  as 
  the 
  eye. 
  The 
  dorsal 
  fin 
  

   is 
  as 
  long 
  as 
  high, 
  its 
  origin 
  being 
  equidistant 
  from 
  the 
  end 
  

   of 
  the 
  snout 
  and 
  from 
  the 
  end 
  of 
  the 
  caudal 
  peduncle. 
  Caudal 
  

   fin 
  deeply 
  forked. 
  Pectoral 
  fin 
  reaching 
  to 
  the 
  origin 
  of 
  

   the 
  dorsal, 
  ventral 
  fin 
  nearly 
  to 
  the 
  vent. 
  The 
  outer 
  ventral 
  

   ray 
  is 
  opposite 
  to 
  or 
  a 
  little 
  behind 
  the 
  last 
  dorsal 
  ray. 
  

  

  The 
  upper 
  two 
  thirds 
  of 
  the 
  body 
  of 
  this 
  species 
  are 
  

   covered 
  with 
  deep 
  black 
  spots, 
  the 
  largest 
  of 
  which 
  are 
  half 
  

   the 
  size 
  of 
  the 
  eye. 
  

  

  The 
  largest 
  of 
  the 
  specimens 
  is 
  12 
  inches 
  long 
  ; 
  its 
  anal 
  

   rays' 
  are 
  covered 
  with 
  seasonal 
  epidermoid 
  tubercles, 
  arranged 
  

   in 
  a 
  series 
  along 
  each 
  ray. 
  

  

  XL11I. 
  — 
  Description 
  of 
  a 
  new 
  Bat 
  from 
  the 
  Gambia. 
  

   By 
  Oldfield 
  Thomas. 
  

  

  Vesper 
  ago 
  (Vesperus) 
  Rendalli, 
  sp. 
  n. 
  

  

  Crown 
  of 
  the 
  head 
  flat, 
  scarcely 
  raised 
  above 
  the 
  level 
  of 
  

   the 
  muzzle 
  ; 
  muzzle 
  broad, 
  the 
  glandular 
  prominences 
  much 
  

   swollen. 
  Ears 
  short 
  ; 
  iaicl 
  forward 
  they 
  reach 
  barely 
  more 
  

  

  