1902,J ICHTHYOLOGY OP THE CONGO. 235 



process f the length of the head. Pectoral half the length of the 

 head ; spine smooth, f the length of the fin. Yentrals small, 

 twice as distant from the root of the caudal as from the end of 

 the snout. Caudal | the length of the head. Dark olive-brown 

 above, whitish beneath ; vertical fins dark, anal edged with white 

 (red ?). 



Total length 210 millim. 



A single specimen was obtained by Mr. G. L. Eates in the 

 Ja River, French Congo, 250 miles from the coast. 



The nearest ally of this new fish is Clariallabes melas Blgr., 

 from -the Lower Congo, which difiers, apart from the generic 

 character of the absence of a free border to the eye, in the longer 

 head, the more numerous rays to the dorsal and anal fins, which 

 unite with the base of the caudal, and the presence of serrations 

 on both sides of the pectoral spine. Clariallabes melas has never 

 been figured ; the upper svirface of the head and of the anterior 

 part of the body is represented on PI. XXII. fig. 2, for comparison 

 with Allahenchelys longicauda. 



Labeo lukul^, sp. n. (Plate XXIII.) 



Body compressed, its depth nearly 4 times in total length; 

 length of head 4g times in total length. Head once and a half 

 as long as broad; snout obtusely pointed, strongly projecting 

 beyond the mouth, covei-ed with large nuptial tubercles ; eye 

 supero-lateral, in the second half of the head, its diameter 6 

 times in length of head, 2| in width of interorbital region, which 

 is flat ; width of mouth, with folded lips, half length of head ; 

 rostral flap and anterior border of lip not denticulated ; posterior 

 border of lip denticulated ; inner surface of lip with numerous 

 feeble, transverse plicae ; a minute barbel, f the diameter of the 

 eye, hidden in the folds at the sides of the mouth. Dorsal III 10, 

 with notched upper border ; the longest ray equals the length of 

 the head. and twice that of the last ; fin a little nearer the root of 

 the caudal than the end of the snout. Anal II 5 ; longest ray 

 S length of head. Pectoral falcate, as long as head, not reaching 

 base of ventral. Ventral reaching vent, its first ray falling under 

 the seventh (fourth branched) ray of the dorsal. Caudal deeply 

 forked, with pointed lobes. Caudal peduncle once and a half as 

 long as deep. Scales 35 ^ ; 4 series of scales between the lateral 

 line and the root of the ventral; 12 scales round the caudal 

 peduncle. Dark olive, belly whitish. 



Total length 250 millim. 



A single specimen from the Lukula River, preserved in the 

 Royal Natural History Museum, Brussels. This species is to be 

 placed near L. macrostomus, L. greenii, and L. 7iasus, from all three 

 of which it is easily distingviished by the number of scales round 

 the caudal peduncle— 12 instead of 16 or 18; in this character 

 agreeing with L. parvus, which difiers in the shorter, less 

 prominent snout, the shorter caudal peduncle, and one series of 



