SYNODONTIS. 



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 4 J 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 serrated in young, smooth or very feebly 



Fiff. 309. 



iyi/nodontis frontosus. 

 L. No (F. N.). i. 



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. Hot. Goz abu Gunuih, White Nile. L. Loat, Esq. (C). 



2. Ad. Gharb-el-Aish, 



3—1. Ho;r. Fashodu, ,, ,, 



