794 Mit. c. r. lurss; LLT ox [^^'<^y --^j 



coa«t ; Vua liiii'bour, on the west coast ; Bisniaikbury; (Kat<anga), 

 on tlio east coast ; Maswa, on the east coast. 



All these saniplew contained vast quantities of inicios('0|»ic alga? 

 and diatoms; but though I searched most diligently for many days 

 and weeks, 1 succeeded in finding only 10 species of Kotifeia, and 

 very few specimens of these, and iiothing new. This })aucity f>f 

 llotatorian life is certainly most remarkable for such a vast lake ; 

 but it is probable that, had collections been made amongst the 

 vegetation near the shore, a greater number and A'ariety might 

 liave been obtained. I understand that the water of this lake 

 was formei'ly somewhat brackish, though the actual salinity was 

 never ascertained, and also that the Claducera are totally absent, 

 whilst the Co})epods are abundant. 



Bdt'ifera futiiul hi Lake Taiiyanyika. 



(J:Jcistes (sp ?) (tubes only, on Plumatella). 



I'objarthra platyptera Ehrenbg. 



SjjncliO'ta (sp. ?) (badly preserved and wholly cout I'acled). 



Asplaiichna intermedia Hudson. 



Jiutiidas sti/laius Gosse. 



Cathj/pna lona Ehrenbg. 



Mouostyla btdla Gosse. 



S(d}>ina brerispiiia Ehrenbg. 



A'liara'd actdt'dta Ehrenbg. 



Jiracliionus 2>ida Elirt.id)g. (vti-y small Viiriety). 



Of these, the only species which A\iis found in .some almndaiice 

 and from various parts of the lake is the small variety of Jinu/d- 

 oniis jxda, me-.isuiiug only 2U5 /.< in total length of the lorica. The 

 European specimens usually mtiisure 325 yu, and someexce})tionallv 

 large specimens found in Ormsby Jiro;ul, m Norfolk, attain a size 

 of 442 ^i. 



S[)ecial inten st attaches to the presence in 'Fanginn ikji of 

 Asplanchna inUriiiedia, as J was not ahle to ii'cord any meudier 

 of this genus fioni Houth Africa (3). 



LuFU RlVEK. 



The Lofu ]i\er is a large tributary of Lake Tanganyika, 

 entering it at its extreme south-western corner. J give a separate 

 list of species found in thisrixcr, as the llotatorian fauna shows a 

 marked increase in nunibt'rs and variety as com]iarr(l with those 

 found in the lake. 



Although oidy two sm.ill tubts of matei-ial were colU'cted Iiy 

 the tow-net, 1 oi)tained therefrom 215 sjucies, one of which is new 

 to science and altogether diirerent from anything known ; the 

 specimen is figured on (Mate LXXN"^. and described below under 

 the name of yoiops lofiiaiia, sp. n. The two gatlu rings weie 

 made in (K-tober 15)04 aliout a mile and a half from tlie moulii of 

 the river, so that it is (pate clear that a fai- greater number of 



