STNODONTIS. 



449 



inner, both with short and mostly bifid branches. Gill-opening not 

 extending downwards beyond root of pectoral spine. Occipito-nuchal 

 shield rough like the occiput, simply convex, longer than broad, with 

 obtuse posterior processes. Humeral process with vermicular rugosities, 

 much longer than broad, acutely pointed, not extending quite so far 

 back as occipito-nuchal process. Dorsal I 7 ; spine feebly curved, 

 about f length of head, striated, smooth in front, feebly striated behind. 

 Adipose dorsal 3 times as long as deep, as lonsf as its distance from 

 rayed dorsal. Anal IV 6, obtusely pointed in front. Pectoral spine 

 slightly longer than dorsal, rather strongly serrated on outer border, 

 more strongly still on inner. Ventral reaching anal. Caudal deeply 

 notched. Caudal peduncle slightly longer than deep. Olive-brown 

 above, with large round black spots, these spots forming three series 

 on the body. 



Total length 135 millim. 



Yembe River, Ubanghi. — Type in Congo Museum, Tervueren. 



39. SYNODONTIS LABEO. 

 Giinth. Ann. & Mag. N. H. (3) xv. 1865, p. 453. 



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



Fin;. ;J37. 



SijnofJonfift hiheo. 

 ■ Type. I 



Head If times as long as broad, rugose, granulate above ; snout 

 nearly twice as long as postocular part of head, terminating in a 



