450 SILUKID.E. 



globular swelling ; eye superolateral, 10 times in length of head, 

 4 times in interorbital width ; lips strongly developed ; chin swollen ; 

 praemaxillary teeth forming a short and broad band ; movable mandi- 

 bular teeth minute, reduced to a few. Maxillary barbel not margined, 

 f length of head, reaching base of pectoral spine ; mandibular 

 barbels with long slender branches. Gill-opening not extending 

 downwards beyond root of pectoral spine. Occipito-nuchal shield 

 granulate like the occiput, convex, 1§ times as long as broad, with 

 obtuse posterior processes. Humeral process longer than broad, rugose, 

 obtusely pointed, not extending so far back as occipito-nuchal shield. 

 Dorsal I 7 ; spine not quite § length of head, striated, feebly granulate 

 in front at the base, very feebly serrated behind. Adipose dorsal 

 7 times as long as deep, nearly twice as long as its distance from rayed 

 dorsal. Anal III 9, pointed in front. Pectoral spine as long as dorsal, 

 not serrated. Ventral not reaching anal. Caudal deeply notched. 

 Caudal peduncle a little longer than deep. Brownish, with numerous 

 round darker spots. 



Total length 720 millim. 



Niger. 



1. Typo, stuffed. Niger. Mr. J. T. Dalton (C). 



40. SYNODONTIS VAILLANTT. 



Synodontis lahio, part., Vaill. X. Arch. Mus. (?>') viii. ]S9<> p 112 pi xii 



fig. 2. 

 Si/nodontis vaUlmiti, Bonleng. Ann. & Mag. N. H. ((5) xx. 1897, p. 42J, and Poiss. 



Bass. Congo, p. ,">19 (1901;. 



Depth of body 4| times in total length, length of head 3J times. 

 Head 1^ times as long as broad, strongly rugose from between the eyes ; 

 snout 1| times postocular part of head, terminating in a spatulate 

 expansion ; eye supero-lateral, 8| times in length of head, 3£ times in 

 interorbital width; lips much developed; praemaxillary teeth in several 

 series; movable mandibular teeth not quite f diameter of eye, 8 or 9 in 

 number. Maxillary barbel not margined, 1 length of head ; outer 

 mandibular barbel as long as maxillary, with short simple branches, 

 inner a little shorter and with bifid branches. Gill-opening not 

 extending downwards beyond root of pectoral spine. Occipito-nuchal 

 shield rugose like the occiput, feebly tectiform, 1J times as long as 



