CLAE1AS. :>81 



87 on anterior arch. Clavicles striated, distinct under the thin skin. 

 Dorsal 66, its distance from occipital process } length of head, its 

 distance from caudal 3 times length of eye. Anal 54, separated from 

 the caudal by a distinct interspace. Pectoral fin nearly half length 

 of head, the spine serrated on the outer border and § the length of 

 the fin. Ventrals a little nearer end of snout than root of caudal. 

 Caudal about half length of head. Olive-brown above, white beneath. 



Total length 590 millim. 



Lake Albert Edward. 

 !• Type. L. Albert Edward. Prof. J. E. S. Moore (C). 



4. CLARIAS SENEGALENSIS. 

 CJnv. & Val. Hist. Poiss. xv. p. 376 (1840) ; Steind. Sitzb. Ak. Wien, lx. i. 1869, 



p. 978 ; Bouleng. Proc. Zool. Soc. 1907, p. 1070. 

 Clarias anguillaris, part., Giinth. Cat. Fish. v. p. 14 (1864). 

 Clarias budgetti, Bouleng. Proc. Zool. Soc. 1900., p. 513. 



Depth of body 6^ to 1\ times in total length, length of head 3 to 3§ 

 times. Head 1^ to If times as long as broad, upper surface more or 

 less coarsely granulate in the adult ; occipital process angular ; frontal 

 fontanelle sole-shaped, 3 to 5 times as long as broad, 4 to A\ times in 

 length of head ; occipital fontanelle very small, in advance of occipital 

 process ; eye small, 3 to 4 times in length of snout, 5^- to 7 times 

 in interorbital width in the adult ; width of mouth nearly equal to 

 interorbital width, § length of head ; band of praemaxillary teeth 6 to 8 

 times as long as broad ; vomerine teeth mostly granular, forming a 

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

 praern axillary band ; nasal barbel ^ to ^ length of head ; maxillary 

 barbel f to once length of head (a little longer in the young), reaching 

 about middle or end of pectoral spine ; outer mandibular barbel 1^ to 

 1 J times as long as inner, which measures f to § length of head. Gill- 

 rakers on first arch fine and closely set, 30 to 40 in number. Clavicles 

 striated and covered with thin skin. Dorsal 65-80, its distance from 

 the occipital process \ to \ length of head, its distance from caudal not 

 or but little greater than diameter of eye. Anal 46-58, narrowly 

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

 serrated on the outer border, § the length of the fin in adult. 

 Ventrals midway between end of snout and caudal or a little nearer the 

 former. Caudal about \ length of head. Olive or dark brown above, 



