ON FISHES FROM LAKE TAXGANYIKA. 17 



3. On a Collection of Fishes £i-om Lake Tanganyika, 

 with Descriptions ol: three new Species. By CI. A. 



BoULExNGER, F.R.S., F.Z.S. 



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

 [Received January 15, 1919 : Read March 4, 1919.] 



(Text-figures 1-3.) 



Wlien recently stationed in the Belgian Congo a,t Albertville, 

 M. Dhont-De Bie, who accompanied the late Dr. L. Stappers on 

 his Tanganyika- Mweru Expedition, made a collection of small 

 iashes which has reached me through the kind mediation of 

 Dr. L. Peringney, Director of the South African Museum. 



The collection, although a large one (1210 specimens), contains 

 representatives of but compai'atively few species, most of the 

 specimens being referable to Tilapia burtoni (780), Ilcqdochilus 

 dhonti (210), and Stolothrissa tanganicce (94). One species, 

 Mastacemhelus mellandi, is an addition to the fauna of Lake 

 Tanganyilia, being previously known from the Hohvin Kiver 

 in Northern Rhodesia (Congo watershed), and three aie here 

 described as new. 



The species i-epresented are the following : — 



Lepidosirexid^. Protoj^terus cethiopicits Heck. (Albertville). 



Clupbid^. Stolothrissa tanganicce Regan (Lukuga River). 



Characinid.^!:. Alestes vittatus Blgr. (Albertville). 



CypRiNiDJE. Barhus serrifer Blgr. (Albertville), B. tcfuio- 

 2yleura Blgr. (Albertville, Lukuga R.). 



Cyprixodontid^. Ilaplochilns dhonti, sp. n. (Lukuga R.), 

 H. pumilus Blgr. (Albertville, Kalimie R., Lukuga R.), Lam- 

 prichthys tanganicanus Blgr. (LidvUga R.). 



CiCHLiUiE. Tilapia melanopleura A. Dum. (Lukuga R.), 

 T. burtoni Gthr. CAlbertville, Kalimie R., Lukuga R.), T. horii 

 Gthr. (Lidiuga R.), T. dardenvii Blgr. (Lukuga R.), Petro- 

 chromis tanganicce Gthr. (Albertville), Parcctilapia lukagce, sp. n. 

 (Lukuga R.), Simochromis diccgrccmma Gthr. (Albertville), Lobo- 

 chilotes lahicUus Blgr. (Albertville), Lanvprologus dhonti, sp. n. 

 (Albertville), Plecoclus paradoxus Blgr. (Albertville). 



MASTACEMBELiDiE. Mastciccmbelus mellcondi Blgr. (Lukuga R.). 



Descrip)tions of the new Species. 



Haploghilus dhonti. 



Depth of body 4| to 5 times in total length, length of head 

 4 times. Head flat above ; snout shoi'ter than eye ; mouth 

 Proc. Zool. Soc— 1919, No. II. 2 



