The Freshwater Fishes of South Africa. 



461 



" Depth of body 5 times in total length, length of head 3-| times. 

 Head a little longer than broad, rugose above from between the eyes ; 

 snout as long as postocular part of head ; eye supero-lateral, 4^ times 

 in length of head, twice in interorbital width; lips moderately 

 developed; pragma xillary teeth forming a short and broad band, 

 movable mandibular teeth not ^ diameter of eye, 18 in number. 

 Maxillary barbel not margined, a little shorter than head, reaching 

 a little beyond base of pectoral spine ; outer mandibular barbels 

 twice as long as inner, with short simple branches, inner with very 

 short, bifid branches. Gill-opening not extending downwards 

 beyond base of pectoral spine. Occipito-nuchal shield rugose like 

 the occiput, as long as broad, posterior processes pointed. Humeral 



FIG. 108. Synodontis tiebulosus. 



process not longer than broad, obtusely pointed, not extending so far 

 back as occipito-nuchal process. 



Dorsal i 7 ; spine shorter than head, smooth in front, serrated 

 behind. Adipose dorsal about 5 times as long as deep, as long as 

 its distance from rayed dorsal. Anal iv 8 ; pointed in front. Pectoral 

 spine shorter than head, feebly serrated on outer border, strongly 

 on inner. Ventral nearly reaching anal. Caudal deeply notched. 

 Caudal peduncle a little longer than deep. 



Yellowish green above, with ill-defined, irregular, large blackish 

 spots, yellowish white beneath ; fins yellowish green with transverse 

 series of black spots. 



Total length 150 millim. 



Lower Zambezi." 



