1900.] FAUNA OF THE WHITE NILE. 973 



X. CENTIPEDES. 



SCOLOPENDRA MOESITANS L. 



Three Centipedes, each about 50 mm. (2 inches) long, obtained 

 at Gabt-el-Meghahid. It is very interesting to find this widely 

 distributed species here: at first I thought it might have beeu 

 brought up among our baggage, but Mr. E. I. Pocock tells me it 

 has only once been met with in Egypt and never before in any 

 part of the Soudan. 



XI. ARACHNIDS. 



Eamily ButhlDjE. 



Buthus emini Pocock, A. M. 1ST. H. (6) vi. p. 98, pi. i. fig. 2 

 (1890). 



Three Scorpions from Gabt-el-Meghahid. The type specimen 

 was obtained by the late Emin Pasha on the shore of the Victoria 

 Nyauza. 



Eamily Pisaurid#:. 



ElJPHROSTHENOPS BAYONIANU8 Brit. Cap. 



A Spider probably of this species, which was described from 

 Angola, was obtained at Gabt-el-Meghahid. 



Eamily Heteropodid^e. 



Sparassus sp. inc. 



Specimens of this Spider were caught at Gabt-el-Meghahid and 

 on board the gunboat ' Abu Klea.' 



Eamily Attidjs. 

 Marpessa (=Marptijsa) sp. inc. 



An apparently undescribed species of Jumping Spider was 

 numerous on board the gunboat ' Abu Klea.' A male and 

 female have been presented to the British Museum. 



XII. CRUSTACEANS. 



Eamily Potamonid.e. 

 Potamon sp. inc. 



This Crab, of which only one specimen was obtained, apparently 

 belongs to a new species, and will be described by Dr. J. G. 

 de Man in a future communication. 



It was found on the sudd in the Bahr-el-Jebel. 



