1907.] AFRICAN SILURID FISHES. 1083 



Clarias camerunensis Lonnberg, Overs. Vet.-Ak. Forli. Stockli. 

 1895, p. 192. 



Depth of body 6 to 7 times in total length, length of head 4 to 

 4 J times. Head I3 to 1| times as long as broad, smooth above, 

 or very finely granulate behind ; occipital j^rocess angular ; frontal 

 fontanelle small, sole-shaped ; occipital fontanelle smaller, jDartly 

 on the occipital process ; eye small, its diameter 2h times in length 

 of snout, 4 or 5 times in interorbital width, which nearly equals 

 width of mouth and is contained twice in length of heacl ; band 

 of prfemaxillary teeth 4 to 5 times as long as broad ; vomerine 

 teeth conical, forming a crescentic band which is as broad as or 

 narrower than the prfemaxillary band ; nasal barbel a little longer 

 than head ; maxillary barbel 2 to 2| times as long as head, 

 reaching beyond base of ventral ; inner mandibular barbel at 

 least as long as head, about | length of outer. 17-22 gill-rakers 

 on first arch. Clavicles concealed under the skin. Dorsal 78-87, 

 its distance from occipital jorocess |- or ^ length of head, almost in 

 contact with caudal. Anal 55-67, almost in contact with caudal. 

 Pectoral | to |- length of head, the spine serrated on both sides, 

 f to I the length of the fin. Yentrals much nearer end of snout 

 than caudal. Caudal | or nearly | length of head. Olive-brown 

 above, whitish beneath ; anal fin with a dark edge. 



Total length 230 millim. 



Old Calabar to Congo. 



21. Clarias alluaudi. 



Boulenger, Ann. & Mag. Is^. H. (7)xvii. 1906. p. 437, and Fish. 

 Nile, p. 296, pi. liii. fig. 2 (1907). 



Clarias macrojyhthalmus (non Pfefifer) Pellegrin, Mem. Soc. 

 Zool. France, xvii. 1905, p. 176. 



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

 4 to 4| times. Head I5 to Ij times as long as broad, smooth 

 above ; occipital process acutely pointed, longer than broad ; 

 frontal fontanelle twice as long as broad, about 4 times in length 

 of head ; occipital fontanelle small, extending on occipital process ; 

 eye 2 or 2| times in length of snout, 4 or 5 times in interorbital 

 width ; width of mouth a little less than interorbital width ; band 

 of prgemaxillary teeth about 4 times as long as broad ; vomerine 

 teeth conical, forming a crescentic band which is longer and a little 

 broader than the band of prtemaxillary teeth ; nasal barbel as long 

 as or a little longer than head ; maxillary barbel 1| to 1| times 

 length of head, reaching ventral or between pectoral and ventral ; 

 outer mandibular barbel 1^ to 1| times as long as inner and about 

 1^ length of head. Gill- rakers moderate, 14 or 15 on anterior 

 arch. Clavicles hidden under the skin. Dorsal 65 to 78, its 

 distance from occipital process about | length of head, extending 

 to root of caudal. Anal 55 to 62, extending to root of caudal. 

 Pectoral | length of head, the spine serrated on both sides and 

 about I the length of the fin. Ventral 1| times as distant from 



Proc. Zool. Soc— 1907, No. LXXII. ' 72 



