﻿Entomostraca 
  from 
  Egypt 
  and 
  the 
  Soudan. 
  27 
  

  

  Daphnia 
  from 
  the 
  White 
  Nile 
  which 
  belongs 
  to 
  the 
  Daphnia 
  

   cucullata 
  group, 
  and 
  probably 
  represents 
  D. 
  jardinei, 
  var. 
  

   bavbata, 
  Weltner. 
  As 
  the 
  specimen 
  is 
  lost 
  I 
  cannot 
  be 
  sure 
  

   of 
  its 
  identity. 
  

  

  (6) 
  Simosa 
  vetula, 
  0. 
  F. 
  M. 
  

  

  Zoological 
  Gardens, 
  Cairo 
  ; 
  pools 
  near 
  the 
  Pyramids 
  ; 
  

   pools 
  at 
  Sakkara 
  and 
  at 
  Tamiah 
  (Fayum). 
  Common. 
  

  

  (7) 
  Ceriodaplinia 
  reticulata, 
  Jur. 
  

  

  Pools 
  near 
  the 
  Pyramids 
  and 
  at 
  Dahchour. 
  Specimens 
  

   taken 
  on 
  March 
  25, 
  1907, 
  in 
  the 
  former 
  place 
  bore 
  ephippia. 
  

   A 
  few 
  individuals 
  possessed 
  the 
  toothed 
  fornix 
  characteristic 
  

   of 
  the 
  variety 
  serrata. 
  

  

  (8) 
  Ceriodaplinia 
  rigaudi, 
  Richard. 
  

  

  Pool 
  by 
  the 
  Pyramids, 
  at 
  Dahchour, 
  and 
  in 
  the 
  Blue 
  Nile. 
  

   Rare. 
  

  

  (9) 
  Ceriodaplinia 
  dubia, 
  Richard. 
  

   In 
  the 
  Nile 
  at 
  Luxor 
  and 
  Kous. 
  

  

  (10) 
  Ceriodaplinia 
  quadrangula, 
  O. 
  F. 
  M. 
  

   Pools 
  by 
  the 
  Pyramids 
  and 
  at 
  Sakkara. 
  

  

  (11) 
  Bosmina 
  longirostris, 
  O. 
  F. 
  M. 
  

  

  The 
  typical 
  form 
  of 
  this 
  species 
  appears 
  to 
  be 
  generally 
  

   distributed 
  and 
  common 
  in 
  pools. 
  The 
  variety 
  cornuta 
  

   occurred 
  in 
  the 
  Zoological 
  Gardens 
  at 
  Cairo 
  in 
  February 
  and 
  

   in 
  the 
  Nile 
  at 
  Luxor 
  and 
  Kous 
  in 
  March. 
  

  

  (12) 
  Moina 
  dubia, 
  Richard. 
  (PI. 
  II. 
  figs. 
  1, 
  2.) 
  

  

  This 
  species 
  appears 
  to 
  be 
  the 
  commonest 
  plankton 
  Clado- 
  

   ceran 
  in 
  the 
  Nile 
  valley. 
  It 
  was 
  found 
  abundant 
  in 
  Lake 
  

   Victoria 
  by 
  Daday, 
  and 
  in 
  the 
  Nile 
  from 
  Omdurman 
  to 
  

   Assouan 
  by 
  Ekman. 
  My 
  own 
  collections 
  show 
  that 
  it 
  is 
  

   common 
  in 
  the 
  Blue 
  Nile 
  and 
  in 
  the 
  Nile 
  itself 
  from 
  Khar- 
  

   toum 
  to 
  below 
  Luxor. 
  

  

  The 
  specimens 
  taken 
  in 
  the 
  Blue 
  Nile 
  in 
  March 
  1902 
  

   include 
  some 
  males 
  and 
  ephippial 
  females. 
  The 
  ephippium 
  

   is 
  not 
  distinguishable 
  from 
  that 
  of 
  Moina 
  rectirostris, 
  since 
  

   it 
  has 
  but 
  a 
  single 
  egg-space 
  surrounded 
  by 
  an 
  incomplete 
  

  

  