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the developnuMit of a ralhrr variod fauna of laml (jastropoda 

 and aniphiltians (l\anidac. liiifoiiidar. Ilyla); iho latter furni- 

 shed us with some material on endoparasites. 



The hike Naivasiia which is further eastward, at tlie bottom 

 of the y:real Rift \'aliey, was marlced as (lie next iialtin^'- 

 phice on our route: l)Ut l)y tlie way we slopped for 'J days on 

 the lake Xakuru where we were surprised at tlie abundance 

 of different kinds of water-birds. 



The lake Naivasiia is on a height of about GOOO ft. and 

 the place surroundino- it has the ciiaracter of a plain chiefly. 

 Here we stopped in the estate of Major Grogan, Loiigonot 

 Estate, who kindly put the manager's house, which is situated 

 on the very bank of the lake, at our disposal. The chief object 

 of our investigations at Longonot was collecting of material 

 on histology and on parasitic Infusoria from the intestine of 

 different hoofed animals. The abundance of big game in the 

 vicinity of the estate greatly facilitated our object. Partly 

 ourselves, and partly with the kind assistance of the manager, 

 M-r Hignell. we collected material on Kongoni (Bitballs cookei), 

 Thompson's gazelle (GazeVa tliomsoni), Grant's gazelle 

 (G. granti), zebras, dik-dik and bushbock. Resides, we 

 succeeded in getting material on intestinal worms and on the 

 histology of the wart hog {Phacoclioerus) serval cat and 

 porcupine. 



The fauna of invertebrates, except small entomological 

 collections and plancton taken from the lake, and samples of 

 ground with Ostracoda, was very little dealt with at Longonot. 



After a fortnight's work at Longonot we found ourselves 

 in Nairobi for the second time, in order to make the necessary 

 preparations for the last part of our voyage. The latter was 

 to consist of a „safari" on foot from the station \'oi (on the 

 way between Nairobi and Mombasa) to the south toward the 

 frontier of British East Africa, and to Kilima-Njaro. We 

 intended to make a halt at an English settlement Taveta to 

 examine two neighbouring lakes (1. Cliala and 1. Jipe), then to 



