On Fresh-water Crustacea. By fiobert Gurney. 281 



Cerioda/phnia dubia Rich. 



Moina rectirostris Jur. 



Macrothrix hirsuticornis Norm, and Brady. 



Alona elcgans Kurz. Rare. 



Cyclops diaphanus Fisch. Few. 



Diaptomus wierzejskii Rich. Common. 



D. incrassatus Sars. 



Chiroccphalus diaphanus Pre v. Common. 



Estheria cycladoidcs- Joly. Common. 



Flooded road : 



Daphnia atkinsoni Baird. 



Moina rectirostris Jur. 



Macrothrix hirsuticornis Norm, and Brady. Abundant. 



Many males and ephippial females. 

 Alona elcgans Kurz. 

 Chydorus letourneuxi Rich. Abundant. Ephippial female 



present. 

 Cyclops diaphanus Fisch. 

 Diaptomus wierzejskii Rich. 



Sebkhet-ek-Riana. 



i 



This great salt like lies somewhat to the north of Carthage. 

 Though full of water at the time of my visit, the Sebkha is dry 

 in summer and salt is taken from it by an English company, 

 which, unfortunately, absolutely forbids all approach to its shores, 

 so that I was unable to collect as freely as I should have desired. 

 Judging from pools by the edge of the lake, the fauna is the same 

 as that of most " Chotts," as described by MM. Blanchard and 

 Richard. The salinity of these pools was excessively high— above 

 1 • 046, which was the highest reading of my salinometer. 



Species found : — 



Moina sp. Ephippium. 



Marshia hlanchardi Rich. Common. 



Artemia salina Linn. 7 females and 2 males. 



Tunis. 



The town of Tunis stands on a ridge which separates the Lake 

 of Tunis from the Salt Lake or Sebkha Sedjouma. The latter, 

 like all salt lakes, is dry in summer, but at the time of my visit 

 was full of water. The lake was then surrounded by a strip of 

 soft and tenacious mud in which the retreating water had left a 

 number of small pools containing water of varying salinity and 



