280 Transactions of the Society. 



which were remarkable for containing four species of Phyllopods, 

 besides several other species of Entomostraca. 



List of species : — 



Daphnia chrevreuxi Eich. 

 D. athinsoni Baird. 

 Simosa vetula Mull. 

 Ceriodaphnia dubia Rich. 

 Moina rcctirostris Jur. 

 Alona elegans Kurz. 

 Cyclops viridis Jur. 



C. bicuspidatus var. lubbocld Brady. 

 Diaptomus incrassatus Sars. 



D. cyaneus sp. n. 

 D. wierzcjskii Rich. 

 Lepidurus lubbocki Brauer. 

 Estheria cycladoides Joly. 

 Ghirocephalus diaphanus Pre v. 

 Streptocephalus bimaris sp. n. 



Sidi Athman. 



Sidi Athman is a station on the line to Bizerta about fourteen 

 miles north-west of Tunis. On the east there stretches a large 

 marshy plain called Garaet-el-Mebtouh, which is part of a great 

 depression following the course of the Oued Medjerdah to the 

 sea at Lake Porto Farina, and extending between Djebel Amar 

 on the south and Djebel Kechabta on the north. The level at 

 Sidi Athman is given on the map as 8 metres. At the time of 

 my visit there was an unusual amount of water on the marsh, 

 while in places the road itself was inundated. Away to the north 

 a large sheet of water was seen, which could not be reached owing 

 to the boggy character of the ground. Close to the road there are 

 drainage ditches and small ponds with abundance of vegetation, 

 notably Ranunculus aquatilis, and harbouring a rich fauna. The 

 following are the species found here : — 



1. In roadside ditch : 



Daphnia atkinsoni. $ and eph. $ . Abundant, many of 



the young showing the characters of D. bolivari Eich. 

 Daphnia magna Strauss. Eare. 



EXPLANATION OF PLATE IX. 



Fig. 6. — Streptocephalus sp. Head of female, x 37. 

 „ 7. — Ditto. Base of the setae on the exopodite of the 6th leg. x 260. 

 „ 8. — Branchinecta sp. Head of female, x 37. 

 ,, 9. — Daphnia chevreuxi Rich. Male, x 57. 

 ,, 10. — Ditto. Post-abdomen of male, x 260. 



