1082 MR. G. A, BOULENGER ON [DeC. 10, 



under the skin. Dorsal 80, its distance from occipital process -f 

 to I length of head, its disfcance from caudal equal to diameter of 

 eye. Anal 70-73, nearly reaching caudal. Pectoral f to | length 

 of head, the spine smooth and about | the length of the fin. 

 "Ventral If to 1| times as distant from base of caudal and from 

 end of snout. Caudal | length of head. Dark brown above, 

 whitish beneath. 



Total length 225 millim. 



Kribi River and Lobi River, South Cameroon. 



19. Clarias angolensis. 



Steindachner, Yerh. zool.-bot. Ges. Wien, xvi. 1866, p. 766, 

 pi. xiii. figs. 4 & 7 ; Boulenger, Poiss. Bass. Congo, p. 259 (1901). 



Clarias gahonensis Giinther, Ann. & Mag. N. H. (3) xx. 1867, 

 p. Ill, and (6) xvii. 1896, p. 274. 



Clarias clolloi Boulenger, Ann. & Mag. N. H. (6) xvii. 1896, 

 p. 311. 



Depth of body 6 to 7 times in total length, length of head 3^ 

 to 41- times. Head 1| as long as broad, smooth or finely striated 

 and finely granulate ; occipital process angular or rounded, as 

 long as broad or broader than long ; frontal fontanelle oval or 

 sole-shaped, twice as long as broad ; occipital fontanelle smaller, 

 extending on the occipital process in the young; eye small, its 

 diameter 3 to 4 times in length of snout, 4^ to 6 times in 

 interorbital width, which, like the width of the mouth, is about 

 •| length of head ; band of preemaxillary teeth nearly 4 times as 

 long as broad ; vomerine teeth conical or subgranular, forming a 

 crescentic band which, in the middle, is about as broad as the 

 prsemaxillary band and may bear a short posterior process ; nasal 

 barbel nearly as long as head; maxillary barbel 1| to 1| times 

 length of head, reaching beyond pectoral, sometimes as far as 

 ventral ; inner mandibular barbel a little shortei' than nasal, |^ or 

 I length of outer. Gill-rakers on first arch fine, not very closely 

 set, 25 to 30 in number. Clavicles exposed, striated or feebly 

 granulated. Dorsal 70-82, its distance from occipital process 1 or 

 i length of head, very narrowly separated from caudal. Anal 

 55-63, narrowly separated from caudal. Pectoral | length of 

 head, the spine serrated on both sides, | to A the length of the fin. 

 Yentrals nearer end of snout than ca^^dal. Caudal about | length 

 of head. Uniform dark brown or black, with more or less 

 distinct light dots. 



Total length 350 millim. 



Cameroon, Gaboon, Congo, Angola. 



20. Clarias bythipogon. 



Clarias hiithiqjogon Sauvage, Bull. Soc. Philom. (7) iii. 1878, 

 p. 96; Glinth. Ann. & Mag. N. H. (6) xvii. 1896, p. 275; 

 Boulenger, Poiss. Bass. Congo, p. 261 (1901). 



Clarias gahonensis (non Gunth.) Sauvage. N. Arch. Mus. (2) iii. 

 1880, p. 39, pi. i. fig. 2. 



