﻿On 
  Freshwater 
  Entomostraca 
  from 
  Egypt 
  &c 
  25 
  

  

  than 
  lono-j 
  separated 
  from 
  the 
  eye 
  by 
  two 
  superposed 
  prge- 
  

   oculars, 
  below 
  which 
  a 
  subocular 
  may 
  be 
  present 
  ; 
  two 
  

   (rarely 
  three) 
  posfoculars 
  ; 
  temporals 
  2 
  + 
  2 
  or 
  3 
  ; 
  eight 
  or 
  

   nine 
  upper 
  labials, 
  fourth 
  and 
  fifth 
  or 
  fifth 
  and 
  sixth 
  entering 
  

   the 
  eye; 
  first 
  lower 
  labial 
  in 
  contact 
  with 
  its 
  fellow 
  behind 
  

   the 
  symphysial 
  ; 
  two 
  or 
  three 
  pairs 
  of 
  chin-shields, 
  first 
  a 
  

   little 
  longer 
  than 
  broad. 
  Scales 
  in 
  15 
  rows, 
  vertebrals 
  

   strongly 
  enlarged, 
  but 
  not 
  twice 
  as 
  broad 
  as 
  long. 
  Ventrals 
  

   176-194; 
  anal 
  entire 
  ; 
  subcaudals 
  77-101. 
  Blackish 
  brown, 
  

   with 
  light 
  cross-bands 
  or 
  rings, 
  which 
  are 
  narrow 
  and 
  white 
  

   on 
  the 
  anterior 
  part 
  of 
  the 
  body 
  and 
  then 
  become 
  gradually 
  

   broader 
  and 
  brown 
  edged 
  with 
  white 
  ; 
  first 
  light 
  bar 
  across 
  

   the 
  occiput; 
  head 
  dark 
  brown 
  above, 
  with 
  light 
  vermi- 
  

   culations 
  and 
  some 
  black 
  spots 
  and 
  a 
  bar 
  across 
  the 
  forehead 
  ; 
  

   a 
  broad 
  black 
  bar 
  below 
  the 
  eye, 
  

  

  Total 
  length 
  600 
  mm.; 
  tail 
  140. 
  

  

  Several 
  specimens 
  from 
  Pueblo 
  Rico, 
  slopes 
  of 
  San 
  Juan 
  

   River, 
  Colombian 
  Choco, 
  5200 
  feet, 
  from 
  the 
  collection 
  of 
  

   Mr. 
  G. 
  Palmer. 
  

  

  IV. 
  — 
  On 
  some 
  Freshwater 
  Entomostraca 
  from 
  Egypt 
  and 
  

   the 
  Soudan. 
  By 
  Robert 
  Gurney, 
  M.A. 
  

  

  [Plate 
  II.] 
  

  

  Our 
  knowledge 
  of 
  the 
  Entomostraca 
  of 
  the 
  Nile 
  Valley 
  is 
  

   exceedingly 
  small, 
  and 
  the 
  following 
  list 
  of 
  species 
  is 
  offered 
  

   as 
  a 
  slight 
  contribution 
  to 
  its 
  extension. 
  The 
  species 
  

   mentioned 
  are 
  derived 
  from 
  two 
  sources 
  — 
  (1) 
  from 
  my 
  own 
  

   collections 
  in 
  Upper 
  Egypt, 
  and 
  (2) 
  from 
  small 
  collections 
  

   made 
  by 
  my 
  brother, 
  Mr. 
  Eustace 
  Gurney, 
  in 
  the 
  White 
  

   Nile 
  and 
  the 
  Blue 
  Nile 
  near 
  Khartoum 
  in 
  1902. 
  

  

  My 
  own 
  collections 
  were 
  made 
  in 
  Egypt 
  in 
  the 
  months 
  of 
  

   February, 
  March, 
  and 
  April 
  of 
  1907 
  and 
  1909. 
  During 
  

   these 
  visits 
  I 
  examined 
  various 
  pools 
  of 
  fresh 
  water 
  from 
  

   Luxor 
  northwards, 
  as 
  well 
  as 
  the 
  Nile 
  itself 
  near 
  Luxor 
  and 
  

   the 
  Birket 
  el 
  Kuruu 
  in 
  the 
  Fayum. 
  

  

  My 
  investigations 
  were 
  not 
  so 
  complete 
  as 
  could 
  be 
  wished, 
  

   owing 
  to 
  the 
  distraction 
  of 
  other 
  interests, 
  the 
  Fayum 
  in 
  

   particular 
  deserving 
  much 
  more 
  attention; 
  but 
  I 
  believe 
  they 
  

   present 
  a 
  fairly 
  complete 
  picture 
  of 
  the 
  Entomostracan 
  fauna 
  

   of 
  the 
  region 
  at 
  that 
  season 
  of 
  the 
  year. 
  They 
  show 
  that 
  

   the 
  fauna 
  is 
  not 
  very 
  varied, 
  and 
  that, 
  like 
  the 
  physical 
  

  

  