The Freshwater Fishes of South Africa. 445 



which equals width of mouth and is length of head; band of 

 premaxillary teeth 6 times as long as broad ; band of vomerine 

 teeth a little narrower than premaxillary band, rather widely 

 interrupted in the middle, composed of small, partly pointed, partly 

 granular teeth ; nasal barbel ?, length of head ; maxillary barbel 

 slightly longer than head, reaching end of pectoral fin ; outer 

 mandibular barbel i length of head, inner nearly f. Gill- rakers on 

 first arch long and closely set, 55 in number. Clavicles hidden 

 under the skin. 



Dorsal 65 ; its distance from occipital process nearly ^ length 

 of head, its distance from caudal 2 diameters of eye. Anal 52 ; 

 narrowly separated from caudal. Pectoral fin f length of head, the 

 spine feebly serrated on its outer border, f the length of the fin. 

 Ventral nearer to point of snout than to caudal. Caudal | length 

 of head. 



Colour (of preserved specimen), pale brown on back, flesh-colour 

 beneath ; top of head marbled with black ; a dark band on base of 

 caudal ; fins whitish. 



One specimen, 218 mm. in length, from German S.W. Africa. 



It is also reported from Natal. 



5. CLARIAS THEODORA, M. Web. 



M. Weber, Zool. Jahrb. Syst., x., 1897, p. 150; Bouleng., Proc. 

 Zool. Soc., 1907, p. 1089, and Cat. Fresh. Fish. Air., ii., p. 262, 

 fig. 218 (1911). 



Depth of body 8 times in total length excluding caudal, length 

 of head, 5f times. Head If times as long as broad, smooth ; 

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

 shaped, twice as long as broad, and T 3 5 length of head ; occipital 

 fontanelle smaller, in advance of occipital process ; eye very small, 

 3 times in length of snout, 4i times in interorbital width, which 

 is nearly T 9 o width of mouth and f length of head ; band of pre- 

 maxillary teeth 4 times as long as broad ; vomerine teeth conical, 

 forming a curved band, which is as broad as the premaxillary band ; 

 nasal barbel length of head, maxillary barbel ^, outer mandibular 

 barbel i, inner | length of head. 14 gill-rakers on anterior arch. 

 Clavicles feebly striated, distinct under the skin. 



Dorsal 80-90 ; its distance from occipital process ^ length of head. 

 Anal 73. Dorsal and anal embracing base of caudal. Pectoral 

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

 strongly on the inner, measuring *- the length of the fin. Ventrals 



