STNODONTIS. 



411 



as the occipito-nuchal process. Dorsal I 7 ; spine £ to once length of 

 head, feebly curved, smooth in front, rather strongly serrated behind. 

 Adipose dorsal 2 J to 4 times as long as deep, 3 to A\ times as long as 

 its distance from rayed dorsal. Anal IV 8-9, acutely pointed in front. 

 Pectoral spine as long as or a little shorter than dorsal, not reaching 

 ventral, outer border distinctly seriated in young, smooth or very feebly 



Fig. 309. 



Synodontis frontosus. 

 L. No (F. N.). §. 



serrated in adult, inner border strongly serrated. Ventral acutely 

 pointed and often produced into a short filament, reaching origin of 

 anal or beyond. Caudal deeply forked, upper lobe the longer. Caudal 

 peduncle deeper than long. Grey-brown to blackish above and below, 

 lips white; young with the body and dorsal fins spotted with black, with 

 some whitish markings at the base of the caudal ; adult uniform or 

 minutely speckled with black. 



Total length 320 millim. 



White Nile, Bahr-el-Gebel, Victoria Nile, Omo, Lake Rudolf.— Type 

 in Paris Museum. 

 1. Hgr. Goz abu Gumah, White Nile. L. Loat, Esq. (C). 



2. Ad. 

 3-4. Hgr. 



Gharb-el-Aish, 

 Fashoda, 



