CLARIAS. 



251 



finely granulate ; occipital process angular or rounded, as long as broad 

 or broader than long ; frontal fontanelle oval or sole-shaped, twice as long 

 as broad ; occipital fontanelle smaller, extending on the occipital process 

 in the young ; eye small, its diameter 3 to 4 times in length of snout, 

 4J to 6 times in interorbital width, which, like the width of the mouth, 

 is about f length of head ; band of pryemaxillary teeth nearly 4 times 

 as long as broad ; vomerine teeth conical or subgranular, forming a 

 crescentic band which, in the middle, is about as broad as the pree- 

 maxillary band and may bear a short posterior process ; nasal barbel 

 nearly as long as head ; maxillary barbel 1^ to If times length of head, 



Fig. 208. 



Clarias angolensis. ^. 

 Type, after Steindachner {I. c). 



reaching beyond pectoral, sometimes as far as ventral ; inner mandibular 

 barbel a little shorter than nasal, f or § length of outer. Gill-rakers 

 on first arch fine, not very closely set, 25 to 30 in number. Clavicles 

 exposed, striated or feebly granulated. Dorsal 70-82, its distance from 

 occipital process J or \ length of head, very narrowly separated from 

 caudal. Anal 55-63, narrowly separated from caudal. Pectoral i 

 length of head, the spine serrated on both sides, f to f the length of the 

 fin. Ventrals nearer end of snout than caudal. Caudal about \ length 

 of head. Uniform dark brown or black, with more or less distinct 

 light dots. 



Total length 350 millim. 



Lagos, Niger Delta, Cameroon, Gaboon, Congo, Angola. — Type in 

 Vienna Museum. 



1. Yg. Odo Omi, head-water of Omi R., Major G. E. Bruce (F). 



Lagos. 



2. Hgr. Sapelle, Niger Delta. Dr. W. J. An.sorge (C). 



3. Hgr. Assay, ,, ,, 



