CLAEIAS. 2ol 



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

 Dorsal 66, its distance from occipital process j 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 f 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 xllbert Edward. 

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



4. CLARTAS SENEGALENSIS. 

 C;uv. & Val. Hist. Poiss. xv. p. 376 (1840) ; Steind. Sitzb. Ak. Wien, Ix. i. 1869, 



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

 Clarias anguiUaris, part., Gunth. Cat. Fish. v. p. J 4 (18(14). 

 Clarias hudgetti, 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 1| 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 4^ 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, f 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 

 proemaxillary band ; nasal baibel ^ to | length of head ; maxillary 

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

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

 1^ 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 y 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, 



