462 SILUEID^E. 



branches, outer £ or | length of head, inner £. Gill-opening not 

 extending downwards beyond root of pectoral spine. Occipito-nuchal 

 shield rugose like the occiput, obtusely tectiform, slightly longer than 

 broad, with obtuse posterior processes. Humeral process granulate, 

 rounded or obtusely pointed, not extending quite so far back as occipito- 

 nuchal process. Dorsal I 7 ; spine feebly curved, a little shorter than 

 head, smooth in front, feebly serrated behind. Adipose dorsal 4 to 

 5 times as long as deep, 2 to 3 times as long as its distance from rayed 

 dorsal. Anal IV 6-7. Pectoral spine nearly as long as head, much 

 more strongly serrated on inner than on outer border. Ventral not 

 reaching anal. Caudal deeply notched. Caudal peduncle nearly as 

 long as deep. Brown, with rather indistinct darker spots and marblings ; 

 rayed fins with round dark spots, which may form transverse bands. 



Total length 140 milium 



Ubanghi. — Type in Congo Museum, Tervueren. 

 1. One o£ the types. Banzyville. Capt. Royaux {(',.). 



49. SYNODONTIS NOTATUS. 

 Synodoidis maculatus (non Hupp.), Vaill. 0. R. Soc. Philom. 1892, no. 16, p. 2. 

 Synodontis iiotatus, Vaill. Bull. Soc. Philom. (8) v. 1893, p. 17, and N. Arch. Mns. 



(3) viii. 1S9G, p. 108, pi. xi. fig. 2 ; Bouleng. Poiss. Bass. Congo, p. 323 



(J 901). 

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

 Head 1-| to 1^ times as long as broad, broader than deep, finely granulate 

 above from between the posterior nostrils ; snout rounded, longer than 

 postocular part of head ; eye nearly lateral, 4 to 4|- times in length of 

 head, If to 2 times in interocular width ; lips moderately developed ; 

 prsemaxillary teeth small and wide apart, forming a short and broad 

 band ; movable mandibular teeth hardly \ diameter of eye, 17 to 20 in 

 number. Maxillary barbel with a narrow marginal membrane at the 

 base, a little longer than head, reaching middle or posterior third of 

 pectoral spine ; mandibular barbels with long, slender, ramified branches, 

 outer twice as long as inner. Gill-opening not extending downwards 

 beyond root of pectoral spine. Occipito-nuchal shield granulate like the 

 occiput, obtusely tectiform, 1^ to 1|- times as long as broad, posterior 

 processes rounded or truncate. Humeral process little longer than 

 broad, flat, granulate, rounded or truncate behind, extending as far back 

 as occipito-nuchal process. Dorsal 1 7 ; spine a little shorter than 

 head, smooth in front, smooth or very feebly serrated behind. Adipose 



