438 Annals of the South African Museum. 



Pectoral about | length of head, not reaching root of ventral. Lobes 

 of caudal obtusely pointed. Caudal peduncle nearly twice as long 



5 1 

 as deep. Scales 41 -f , 5 between lateral line and root of ventral ; 



lateral line complete. Yellowish, with 15 brown vertical bars; a 

 large black, light-edged ocellus at the root of the caudal fin, as in 

 X. ocelUca-uda Blgr. Total length 48 mm. 



A single specimen from Sesheke, R. Zambezi; presented by the 

 Rev. L. Jalla. 



Type in the South African Museum, No. 14844. 



Closely allied to N. luapulae Blgr. (Rev. Zool. Afr. IV, p. 164, 

 1915) from the Luapula River, Katanga (Congo System). 



FAMILY SILURIDAE. 

 SYNODONTIS COLYERI, n. sp. 



Depth of body equal to length of head, 4 times in total length. 

 Head 1 times as long as broad, feebly rugose above behind snout, 

 which is rounded and slightly longer than postocular part of head; 

 eye supero-lateral, 6 times in length of head, twice in interorbital 

 width; lips moderately developed; premaxillary teeth forming a 

 short and broad band; movable mandibular teeth \ diameter of eye, 

 22 in number. Maxillary barbel with a narrow marginal membrane 

 at the base, as long as head, reaching anterior fourth of pectoral 

 spine; outer mandibular barbel not quite twice as long as inner, 

 the former with long slender branches, the latter with tubercular 

 branches. Gill-opening not extending downwards beyond root of 

 pectoral spine. Occipito-nuchal shield \\ times as long as broad, 

 with pointed posterior processes. Humeral process much longer 

 than broad, not keeled, sharply pointed. Dorsal I 7 ; spine f length 

 of head, feebly curved, smooth in front, rather strongly serrated 

 behind. Adipose dorsal 4 times as long as deep, 3 times as long 

 as its distance from rayed dorsal. Anal III 7, rounded. Pectoral 

 spine a little shorter than head, strongi (/ serrated on both sides. 

 Ventral not reaching anal. Caudal strongly forked, upper lobe the 

 longer. Caudal peduncle as long as deep. Olive-brown above, 

 whitish beneath, with numerous black spots. Total length 14'2 mm. 



A single specimen from Mansa River, N. Rhodesia; collected by 

 Dr. Colyer. 



Type in the South African Museum, No. 14529. 



Allied to S. zambesensis Peters. 



