552 ME. G. A. BOrLENGER ON A COLLECTION 



once and | to once and ^ length of head ; outer mandibular barbel nearly twice 

 as long as inner and half length of head ; vomero-pterygoid teeth forming a long 

 and narrow crescentic band ; occipital process narrow, narrowly separated from the 

 small interneural shield. Dorsal I 6, nearly twice as distant from the root of the 

 caudal as from the end of the snout ; spine serrated behind, | length of head ; longest 

 soft rays | to f length of head. Adipose dorsal small, 2 to 3 times as long as deep 

 its base 3 to 4 times in its distance from the rayed dorsal. Anal IV 10. Pectoral 

 spine about f length of head, feebly serrated on outer side, more strongly on inner 

 side. Ventral not reaching anal. Caudal deeply forked, with pointed lobes, outer 

 rays 3 to 3J times as long as the median. Caudal peduncle twice as long as deep. 

 Colour in life olive above, shading to light grey and silver below ; anterior edge of 

 dorsal fin red, the tip black ; maxillary barbels and ventral and caudal fins pinkish. 



Total length 220 millim. Said not to grow larger. 



Two specimens from Niamkolo and one from Mbete. Native name : Sianenna. 



A very distinct species, to be placed near C. furcatus Gthr. 



Phtllonemus, g. n. 



Allied to Chrysichthys Blkr., but without nasal barbels and with the maxillary 

 barbel fringed on both sides by a leaf-like membrane in its distal part ; only vomerine 

 teeth on the palate. 



20. Phtllonemus typus, sp. n. (Plate XXXII. fig. 3.) 



Depth of body 5J times in total length, length of head 3J times. Head smooth, 

 once and ^ as long as broad ; occipital process very short, widely separated from 

 the dorsal ; snout flat, broadly rounded, subtruncate, projecting very slightly beyond 

 the mouth ; eye J length of head, equal to interorbital width ; maxillary barbel once 

 and f as long as head, extending beyond extremity of pectoral ; outer mandibular 

 barbels as long as head, twice as long as inner ; vomerine teeth in a short trans- 

 verse series. Dorsal I 6, a little nearer end of snout than root of caudal ; spine 

 short and feeble; longest rays f length of head. Anal 12, opposed to adipose dorsal, 

 which is about ^ as long as its distance from the rayed dorsal. Pectoral spine ^ length 

 of head, strongly serrated on its inner border. Ventral inserted a little behind vertical 

 of dorsal, not reaching anal. Caudal peduncle a little longer than deep. Caudal 

 deeply notched. Brown above, white below ; maxillary barbels blackish at the end ; 

 dorsal dark brown, adipose dark brown, white behind ; caudal brown, each lobe tipped 

 with white ; anal white, dark brown at the base ; ventrals white. 



Total length 73 millim. 



A single specimen from Niamkolo. Native name : Kapondo. 



