The Freslwvater Fishes of South Africa. 561 



Colour (of preserved specimens) dark brown ; body and fins 

 covered with small round black spots, those on throat and anterior 

 part of belly slightly smaller than the rest. 



One specimen, 183 mm. in length, from Lialui, Barotseland, Upper 

 Zambesi. 



One specimen, 166 mm. in length, from Lake Nganii. 



This species is also reported from Lakes Tanganyika, Bangwelu and 

 Mweru. 



SYNODONTIS JALLAE, n. sp. 



Premaxillary teeth forming a short broad band ; movable niandi- 

 bular teeth about ^ diameter of eye in length, 16 in number. Depth 

 of body 4 times in total length excluding caudal, length of head 3f 

 times. Head 1^ as long as broad, strongly rugose above from a little 

 in advance of eyes; snout obtusely pointed, about \ length of head, 

 a little longer than postocular part of head ; eye supero-lateral, 6| 

 times in length of head, a little more than 2f times in interorbital 

 width ; width of mouth about \ width of head ; maxillary barbel ~ 

 length of head, with a narrow marginary membrane at base, not 

 reaching base of pectoral spine ; outer mandibular barbel about f 

 length of head and 1| times as long as inner, both of them with short 

 tubercular branches ; lips moderately developed. Gill-openings not 

 extending downwards beyond root of pectoral spine. Occipito-nuchal 

 shield very rough like occiput, obtusely tectiform, nearly twice as long 

 as broad, with rounded posterior processes. Humeral process broad, 

 obtusely pointed, upper border curved, longer than broad, granulate, 

 indistinctly keeled, extending about as far back as occipito-uuchal 

 process. 



Dorsal i 7 ; spine 1^ times as long as head, feebly curved, striated, 

 smooth in front and feebly serrated behind in its upper part. Adipose 

 dorsal 4f times as long as deep, 1 T 3 Q times as long as its distance from 

 rayed dorsal. Pectoral spine a little more than f length of head, not 

 reaching ventral, finely serrated on its outer border and strongly on 

 inner. Ventral not reaching anal. Anal iv 7. Caudal deeply forked, 

 upper lobe the longer ; caudal peduncle If times as long as deep. 



Colour (of preserved specimen) dark olive-brown above, lighter 

 below ; body, fin-membranes and head covered with small dark spots, 

 which become mere specks on belly, throat and head. 



One specimen, 170 mm. in length, fi-om Shesheke, S. Rhodesia 

 (Rev. Jalla). 



39 



