1910.] ROTIFEKA FROM TANGANYIKA. 795 



Ilotifei's are cairied into the lake l)y this river tlian can at'terwai'ds 

 he found in its water. 



liot'tfera fo and in the Lofa Jilver. 



CEcistes vinciaola Kellicott. 

 Lhnnias (sp. ?) (tuhes only). 

 CaUidhia (sp. ?) (wholly contracted). 

 Synchceta oblonga Ehrenbg, 

 jS^oiops lofamuc, sp. n., Rousselet. 

 ]'ro(des daq^Jmicola Thompson. 

 liaitidus lomjiseta Sclirank. 

 „ gracilis Tessin. 



,, bicristat'us Gosse. 

 ,, viacerus Gosse. 

 Eachlavis hyaliva Hudson. 



,, oropha Go.sse. 



,, propatida Gosse. 

 Motibstyla lunar is Ehrenbg. 

 Cathypna leoidina Tui'nei'. 



,, iivgtdata Gosse. 



,, luna Ehrenbg. 



Salpina macracaiiiha Gosse. 

 rterodina trilohata Shephard. 

 Xoteas quadricornis Ehrenbg. 



,, ,, var. h'evisjnuits Daday, 



Brachionus militaris Ehrenbg. 

 Anurcea acideata var. valga Ehrenbg. 



NoTOPS LOFUAXA, sp. n. (Plate LXXV. figs. 1-3.) 

 Amongst the Rotifera found in the Lofu river there is one new 

 species which appears so different from any known kind, that I find 

 difficulty in assigning it to any known genus. Unfortunately 

 the only specimen available is not sufficiently well presei-ved to 

 enable one to be sure that the integument is not to some extent 

 distorted. Its general shape and appearance suggests a Xotops, or 

 Gastropus, and in the absence of a fuller- knowledge of its anatomy 

 1 have provisionally placed it in this genus under the above nanje. 

 The figs. 1 and 2 of Plate LXXV. give an exact outline of its 

 appearance in dorsal and lateral view, and 1 am indebted to my 

 friend Mr. F. R. Dixon-Xuttall for these accurate draAvings which 

 he has made from the mounted specimen. Fig. 8 rejiresents the 

 jaws, which I have drawn under gi'eat difiiculties and as accurately 

 as was possible under the circumstances. 



The anterior half of the body is stout, somewhat compressed 

 dorso-ventrally, presenting a wide semicircular front with broad 

 lateral lobes. The oral region appears to project prominently on 

 the antero-venti'al side; but it is quite possible that this appearance 

 may be due to distortion, as the whole animal is not very well 

 preserved. The posterior half of the body, which shows a dtep 



