1907.] AFRICAN SILURID FISHES. 1089 



Gill-rakers rather long, 15 on anterior arcli. Clavicles feebly 

 striated and covered with a thin skin. Dorsal 80, its distance 

 from occipital process i length of head. Anal 65. Both dorsal 

 and anal embi-acing root of caudal. Pectoral |- length of head, 

 its spine serrated on both sides and measuring | the length of 

 the fin. Yentral once and ^ as distant from caudal as from end 

 of snout. Caudal a little more than | length of head. Blackish 

 brown above, a little lighter beneath. 



Total length 155 millim. 



Upper XJbanghi. 



30. Clarias theodor.*:. 



M. Weber, Zool. Jahrb., Syst. x. 1897, p. 150. 



Depth of body 6 times in total length, length of head 4^ to 5| 

 times. Head once and -| as long as broad, smooth ; occipital 

 process angular, broader than long ; frontal fontanelle sole-shaped,, 

 twice as long as broad and about ^ length of head ; occipital 

 fontanelle smaller, in advance of occipital process ; eye very 

 small, 3 times in length of snout, 6 times in interorbital width, 

 which equals width of mouth and a little less than ^ length of 

 head ; band of prasmaxillary teeth 4 times as long as broad ; 

 vomei'ine teeth conical, forming a curved band which is as broad 

 as the prfemaxillary band ; nasal barbel -i length of head ; 

 maxillary barbel as long as or a little longer than head, as long as 

 outer mandibular. 14 gill-rakers on anterior arch. Cla^dcles 

 feebly striated, distinct under the skin. Dorsal 80-90, its 

 distance from occipital process -^ length of head. Anal 67-73. 

 Dorsal and anal embracing base of caudal. Pectoral about J 

 length of head, its spine feebly serrated on the outer side, strongly 

 on the inner and measuring | to f the length of the fin. Ventral 

 once and | as distant from caudal as from end of snout. Caudal 

 about J length of head. Greenish grey to blackish. 



Total length 180 millim. 



Natal. 



31. Clarias fouloxi. 



Boulenger, Ann. & Mag. N. H. (7) xvi. 1905, p. 644. 

 Depth of body 6g times in total length, length of head 5 

 times. Head once and | as long as broad, smooth ; occipital 

 process angular ; frontal fontanelle sole-shaped, j length of 

 head, twice as long as occipital fontanelle, which is in advance 

 of occipital process ; eye 3 times in length of snout, 5 times in 

 interorbital width, which is about ^ length of head and equals 

 width of mouth ; band of pr^emaxillary teeth 4 times as long as 

 broad ; vomerine teeth conical, forming a crescentic band which, 

 in the middle, is a little broader than the prajmaxillary band ;. 

 nasal barbel ^, maxillary barbel i, outer mandibular | length 

 of head. Gill-rakers about 20 on anterior arch. Clavicles. 



