240 



SILURID^. 



occipital process angular ; frontal fontanelle knife-shaped, 3 to 4 times 

 as long as broad, 4 to 5 times in length of head; occipital fontanelle 

 indistinct; eye 1\ (young) to 4 times in length of snout, 4 to 6f 

 times in interorbital width ; width of mouth nearly equal to interorbital 

 width; band of praemaxillary teeth 4 to 5| times as long as broad; 

 vomerine teeth granular, forming a crescentic band which is as broad 

 as the praemaxillary band ; nasal barbel f to \ length of head (f in the 

 very young) ; maxillary barbel f to once length of head (longer in the 

 very young), reaching base or extremity of pectoral spine ; outer man- 

 dibular barbels \ to f length of head (as 

 long as head in the very young). Gill- Pl S- 199 - 



rakers long and closely set, 45 (young)-70 _<#> — ?—^. )) 

 on anterior arch. Dorsal 78-85, its distance 

 from the occipital process j to ^ length 

 of head, its distance from caudal fin equal 



Type (F. N.) 



to or a little less than diameter of eye. Anal 60-70, touching root 

 of caudal. Pectoral not quite half length of head, the spine very 

 slightly serrated on the outer border, f (young) to § the length of 

 the fin. Ventrals equally distant from end of snout and from caudal, 

 or a little nearer the former. Caudal nearly \ length of head. Dark 

 olive-brown above, greyish beneath. 



Total length 430 millim. 



Lake Tsana, Abyssinia. 

 1-3. Types. Zegi. Mr. E. Degen (C). 



10. CLARIAS CAPENSIS. 

 Cuv. & Val. Hist. Poiss. xv. p. 377 (1840) ; Bouleng. Poiss. Bass. Congo, p. 255 

 (1901), Pi-oc. Zool. Soc. 1907, p. 1075, and Ann. Natal Mus. i. 1908, p. 237. 



Depth of body 6f to 7^ times in the total length, length of head 

 4 times. Head once and \ as long as broad, its upper surface coarsely 

 granulate ; occipital process angular ; frontal fontanelle 3 \ to nearly 



