On Fresh-water Crustacea. By Robert Gurney. 279 



the level sinks and there is an inflow of salt water from Lake 

 Bizerta. No Entomostraca were found in the lake, the only 

 Crustacea seen being a species of Sphs&roma and Gammarus 

 locusta. Shells of Card i urn were picked up on the shore, so that 

 it is probable that the fauna is a brackish- rather than a fresh- 

 water one. A thorough investigation of the lake would prove of 

 great interest. A very strong stream was flowing out at the north- 

 west end of the lake into the Oued Tindja, and at this point, in a 

 backwater, Gobius rhodopterus and Anguilla vulgaris were found 

 abundant, and a large species of Balanus was found upon some 

 wooden posts. Close to the outflow there is a large, weedy marsh, 

 swarming with frogs, and with a rich Entomostracan fauna. 



List of species : — 



Macrothrix hirsuticornis Norm, and Brady. 



Alona elegans Kurz. 



Chydorus sphserictis. 



Cyclops strenuus Eisch. 



C. plamis sp. n. 



C. serrulatus Fisch. 



Canthocamptus trispinosus Brady. 



Diaptomus numidicus sp. n. 



Poppella guernei Eich. 



The following species were found in a large pond not far from 

 this point : — 



Daphnia chevreuxi Eich. 



Ceriodaphnia dubia Eich. 



Simosa vetula Miill. 



Moina rectirostris Jur. 



Macrothrix hirsuticornis Norm, and Brady. 



Chydorus sphxricus. 



Cyclops macrurus Sars. 



C. viridis Jur. 



C. diaphanus Fisch. 



C. planus sp. n. 



C. bicuspidatus var. lubbocki Brady. 

 Canthocamptus staphylinus Jur. 

 Diaptomus incrassatus Sars. 



D. weirzejsMi Eich. 

 D. ingens sp. n. 



D. cyancus sp. n. 



Est her in cycladoides Joly. 



Streptocephalus sp. 



Near the station, on the east of the line, the soil is sandy and 

 dune-like, and among the dunes there were some small rain-pools, 



