ON NEW FISHES FROM LAKE TANGANYIKA. 399 



25. On some new Fishes from near tlie West Coast of Lake 

 Tanganyika. By G. A. Boulenger, F.R.S., F.Z.S. 



(Published by pennission of the Trustees of the British Museum.) 



[Received Sej^tember 5, 1919 ; Read November 4, 1919.] 



(Text-figures 6-10.) 



A few months ago I reiDorted in these Proceedings* on a 

 collection of Fishes made at Albertville by M. Dhont-De Bie, of 

 the Belgian East African Expeditionary Force. On returning 

 home in May last, the same gentleman has brought me further 

 specimens from localities near but outside the great lake, among 

 which were repi'eseutatives of six undescribed species. 



These Fishes are from three localities : — 



(1) A ditch (marigot) along the Lukuga River: Protoptent,s 

 ce.thiopicus Heck., Clarias AiZp'enfZo?^ Blgr. (previously known from 

 Lake V\>\\k\YSi), Aitchenoglanis occidentalis G.&Y.,Aiiabas ctertotis, 

 sp. n., and JIastacembelus tceniatus Blgr. 



(2) Tumbwe, a village S.W. of the Kalemie River, on a small 

 stream flowing into the Niemba River, a tributary of the Lukuga : 

 Laheo dhonti, sp. n., Barhus euchilits, sp. n., B. miochihts, sp. n., 

 B. holotcenia Blgr. 



(3) Kabeke, a village 30 miles south of Tumbwe, on the Niemba 

 River: Allahenchelys dhonti, sp. n., Amphilltts ]jlati/chir Gthr., 

 Phractioi-a hckicgce, sp. n., an association very suggestive, so far as 

 genera are concerned, of the rivei'S of South Cameroon, whence 

 the two first known representatives of the genus Allabenchelys 

 Blgr. were described, and where several AmpMlius Gtlir., and 

 Phractttra Blgr., are at home. 



It is remarkable that no members of the family Cichlidce, which 

 form the great majority in the Tanganyika Fish-fauna, should 

 have been collected in these three localities. Characinidce are 

 also absent. 



Descriptions of the neiv Species. 

 Labeo dhonti. 



Body feebly compressed, its depth 5 to 5| times in total length. 

 Head 4 to 41- times in total length, its width | its length ; snout 

 rounded or very obtusely pointed, strongly projecting, with a 

 curved transverse groove above, its length less than half that of 

 head ; eye small, supero-lateral, 5 to 5i times in length of head ; 

 interorbital width 4 length of head ; width of mouth (with lips) 

 |- to ^ length of head; lips strongly developed, upper straight- 

 edged, lower more or less expanded and bordered in front by a 

 fringe of papillje, the posterior border strongly festooned ; inner 

 surface of lips with small papillae forming ninnerous transverse 



* Cf. P. Z. S. 1919, p. 17. 



