1084 MR. G. A. BOULENGER ON [DeC. 10, 



root of caudal as from end of snout. Caudal about 4 as long as 

 head. Blackish brown above, lighter brown beneath. 



Total length 230 millim. 



Lake Victoria. 



22. Clarias werneri. 



Boulenger, Ann. & Mag. N. H. (7) xvii. 1906, p. 569 ; 

 Wernei', Sitzb. Ak. Wien, cxv. i. 1906, p. 1135, pi. iv. ; 

 Boulenger, Fish. Nile, p. 297, pi. liii. fig. 3 (1907). 



Depth of body 6^ to 8 times in total length, length of head 4| 

 to 5 times. Head about once and ^ as long as broad, smooth or 

 very feebly granulate above ; occipital process angular, not longer 

 than broad ; frontal fontanelle more or less distinctly sole-shaped, 

 li to 2 times as long as broad, its length 4 to 5 times in that of 

 the head ; occipital fontanelle as large or a little smaller, oval or 

 elliptic, partly on occipital process ; eye 2 to 3 times in length 

 of snout, 5 to 6 times in interorbital width ;' width of mouth 

 a little less than interorbital width ; band of pra^maxillary teeth 

 3 to 4 times as long as broad ; vomerine teeth granular, forming 

 a crescentic band which is as broad as or a little narrower than the 

 prfemaxillary band ; nasal barbel nearly once to once and | length 

 of head ; maxillary barbel li to 2 times length of head, reaching 

 extremity of pectoral or beyond ; outer mandibular barbel about 

 once and ^ as long as inner and equal to or longer than head. 

 Gill-rakers moderate, 16 to 18 on anterior arch. Clavicles hidden 

 under the skin. Dorsal 82 to 91, its distance from occipital process 

 nearly ^ length of head, in contact with or very narrowly separated 

 from caudal. Anal 68 to 72, in contact with or very narrowly 

 separated from caudal. Pectoral nearly ^ length of head, the spine 

 very feebly serrated on the outer border and about | the length 

 of the fin. Yentral If to 1| times as distant from root of caudal 

 as from end of snout. Caudal about | as long as head. Blackish 

 brown above, lighter beneath. 



Total length 230 millim. 



Uganda. 



23. Clarias macromystax. 



Gunther, Cat. Fish. v. p. 17 (1864). 



Depth of body 6^ times in total length, length of head 4 times. 

 Head 1^ as long as broad, finely granulate above ; occipital process 

 angular ; frontal fontanelle oval, not quite twice as long as broad ; 

 occipital fontanelle smaller, in advance of occipital process ; eye 

 small, its diameter 3 times in length of snout, 5| times in inter- 

 orbital width, Avhich equals width of mouth and f length of head ; 

 band of pr?emaxillary teeth only 3 times as long as broad ; 

 vomerine teeth mostly granular, forming a large fan-shaped patch 

 the longitudinal diameter of which exceeds the width of the prse- 

 maxillary band ; nasal barbel as long as head ; maxillary barbel 

 li length of head, reaching nearly to base of ventral; inner 



