486 SILUK1DJE. 



Ventral extending beyond origin of anal. Caudal deeply forked, upper 

 lobe more or less produced. Caudal peduncle twice as long as deep. 

 Yellowish brown above, with large dark brown marblings forming more 

 or less regular cross-bands ; a black bar at the base of the caudal ; 

 lower parts white ; fins whitish, a greyish band across the caudal. 



Total length 38 milliin. 



South Cameroon. 

 1-4. Types. Efulen. G. L. Bates. Esq. (C). 



5. Type. Tributaries of Lobi R., ,, 



S.W. of Efulen. 



6. Hgr. Lobi R. ,, 

 7-1 b'. Ad. & hgr. Ja R. „ 



31. EUCHILICHTHYS. 



Bouleng. Ann. & Mag. N. H. (7) vi. 1900, p. 522, Poiss. Bass. Congo, p. 330 

 (1901), and Ann. Mus. Congo, Zool. ii. p. 47 (1902). 



Body moderately elongate, not or but feebly compressed. Dorsal fin 

 entirely in advance of ventrals, formed of a spine aud 6 branched rays ; 

 an adipose fin opposed to the anal, which is short. Pectoral with a 

 spine. Ventral with 7 rays. A cephalo-nuchal bony shield. Mouth 

 large, inferior, surrounded by a much-developed, circular, papillose lip ; 

 a broad band of pointed, curved, movable teeth in the pra?maxillaries, 

 this band entirely in advance of the narrower band of mandibular teeth, 

 the base of which is long and slender, the crown truncate or notched 

 and bent up hook-like. A barbel on each side, and a pair of very short 

 ones on each side of the lower section of the circular lip. Nostrils 

 rather close together, the posterior with a valve ; eye with free border. 

 Gill-openings short, confined to the sides. Air-bladder small, free, 

 trilocular. 



Vertebra 37 (16 + 21). 8 branchiostegal rays. 



Congo System. 



Synopsis of the Species. 



Depth of body 7 times in total length ; eye 10 



times in length of head, 5 times in inter- 



oeular width ; base of adipose fin 4 its 



distance from dorsal \. E. guenthcri, Schilth., p. 487. 



D6pth of body 5-1- to 6£ times in total length ; 



eye 5 to 7 times in length of head, 2 to 3 



