little-known African Silurid Fishes. 527 



1. Doumea typica. 

 Doumea typica, Sauv. II. cc. pi. iii. fig. 1. 



Depth of body slightly less than its width, 8 times in total 

 length. Head strongly depressed, with slightly rugose skull 

 covered with a thin skin, 1^ as long as broad, 5^ times in 

 total length ; snout pointed, projecting a little beyond the 

 mouth, If as long as postorbital part of head; internarial 

 space equally distant from end of snout and eye; latter 

 directed upwards, its diameter 6^ times in length of head, 

 1£ in interorbital width ; maxillary barbel 5 length of head, 

 mandibular barbels shorter still. Occipital process narrow, 

 3 times as long as broad, not reaching interneural shield. 

 Dorsal I 6, first ray a little longer than the head. Anal I 7. 

 Pectorals reaching the ventral*, which extend far beyond 

 origin of anal. Caudal with crescentic notch. Caudal 

 peduncle a little depressed, 3 total length. Uniform brownish 

 in spirit. 



Total length 90 millim. 



The unique specimen in the Paris Museum is from the 

 falls of Doume', Upper Ogowe. 



6. PHRACTURA, n. n. 



Peltura (non M. -Edwards), Perugia, Ann. Mus. Genova, (2) x. 1892 * 

 p. 972. 



Body elongate, depressed, with extremely slender caudal 

 peduncle; a series of imbricate scute3 along each side of the 

 back and belly from the dorsal and ventral fins to the caudal 

 peduncle, which is entirely surrounded by bony scutes. Two 

 short dorsal fins, the anterior entirely in advance of the 

 ventrals and formed of one simple, flexible, and 6 or 7 

 branched rays, the second opposed to the anal and formed of 

 fine soft rays; pectoral and ventral fins large, horizont. illy 

 expanded, without spine, but with thickened, simple outer 

 ray ; 10 rays to the pectoral, 6 to the ventral. No cephalo- 

 nuchal shield. Mouth small, inferior, surrounded with large 

 papillose lips ; no mandibular teeth ; small conical prae- 

 maxillary teeth ; a maxillary and two mandibular barbals 

 on each side ; nostrils rather remote from each other, both 

 with a valve ; eyes small, without free border. Gill-clefts 

 narrowly interrupted at the isthmus. 



Two species. 



35* 



