24S 



S1LUKI.DJE. 



f length of head. 20 gill-rakers on anterior arch. Clavicles not 



exposed. Dorsal 58-60, its distance from the occipital process \ length 



of head, its distance from caudal greater 



than diameter of eye. Anal 40-42, not Fig. 205. 



reaching caudal. Pectoral about \ length 



of head, the spine not serrated, about § the 



length of the fin. Ventrals much nearer 



end of snout than caudal. Caudal \ length 



of head. Uniform blackish brown above, 



brownish white beneath. 



y\^.£^&m^B0Mk 





■"■ ^Wm 



Clarias breviceps. 

 Type (A. M. C). f. 



Total length 190 millim. 



Mayombe, West Africa. — Type in Congo Museum, Tervueren. 

 1. Ooe of the types. Marshes of Siala Ntoto, Mayombe. Major Cabra (C). 



18. CLARIAS WALKERI. 



Giintli. Ann. & Mag. N. H. (6) xvii. 1896, p. 274, pi. xiv. fig. B ; Bouleng. Proc. 

 Zool. Soc. 1907, p. 1080. 



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

 times. Head lj to 1^ times as long as broad, smooth above, or very 

 finely granulate behind ; occipital process angular ; frontal fontanelle 

 small, sole-shaped ; occipital fontanelle smaller, in advance of or slightly 

 encroaching upon occipital process ; eye very small, its diameter 3 to 4 

 times in length of snout, 6 to 8 times in interorbital width, which 

 nearly equals width of mouth and is contained twice in length of head ; 

 band of praemaxillary teeth 4 to 5 times as long as broad ; vomerine 

 teeth conical, forming a crescentic band which, in the middle, is about 

 as broad as the praemaxillary band ; nasal barbel § to f- length of head ; 

 maxillary barbel \\ to 2 times as long as head, reaching extremity of 

 pectoral or base of ventral ; inner mandibular barbel a little shorter 

 than nasal, \ to f length of outer. Gill-rakers on first arch widely set, 

 12 to 15 in number. Clavicles concealed under the skin. Dorsal 



