426 SILUEID.E. 



maxillary teeth forming a short and broad band ; movable mandibular 

 teeth not half diameter of eye, 45 to 54 in number. Maxillary barbel 

 without or with only a trace of marginal membrane, 1 to If times 

 length of head, reaching between anterior and posterior third of pectoral 

 spine ; anterior barbel with slender branches, If to 2 times as long as 

 inner, which bears shorter but ramified branches. Gill-opening not 

 extending downwards beyond root of pectoral spine. Occipito-nuchal 

 shield rugose and convex like the occiput, 1-| to If times as long as 

 broad, posterior processes pointed. Humeral process much longer than 

 broad, feebly keeled, acutely pointed, extending as far back as occipito- 

 nuchal process, or not quite so far. Skin villose on sides. Dorsal I 7 ; 



Fig. 320. 





Mi - ~ - ~ „ *- 



Sijnodontis afro-Jischeri. 

 Bunjako (F. N.). §. 



spine straight or feebly curved, § to once length of head, smooth in 

 front, serrated behind. Adipose dorsal 3| to 4 times as long as deep, 

 ]^ to 2^ times as long as its distance from rayed dorsal. Anal IV 7-8, 

 rounded. Pectoral spine as long as or a little shorter than head, not 

 reaching ventral, rather strongly serrated on outer edge, very strongly 

 on inner. Ventral not reaching anal. Caudal deeply forked, upper 

 lobe slightly the longer. Caudal peduncle a little longer than deep. 

 Dark brown above and beneath, with some lighter, yellowish-brown 

 marblings or wavy cross-bands and round blackish spots ; fins grey, 

 with transverse series of black spots sometimes forming cross-bars. 



Total length 145 millim. 



Lake Victoria.— Type in Berlin Museum. 



