some Freshwater Fishes from Lower Congo. 173 



species lias no likeness whatever, as the shape of the head 

 and the caudal peduncle, the size of the eye, and the adipose 

 fin are completely different. 



Synodontis acanthomias, Blgr. 



Native name " Nkoko." 

 Locality. Mukimbungu, in a lake. 

 One specimen. 



Synodontis caudalis } Blgr. 



Native name " Ntanta." 



Locality. Mukimbungu. 



Two specimens. 



The present specimens differ from Boulenger's description 

 in having the outer mandibular barbel of the same length as 

 the head and the occipital nuchal shield rugose. With regard 

 to the colour, one of the specimens has the fins beautifully 

 marked with roundish dark spots serially arranged. The 

 body is more or less marbled. In the other specimen the fins 

 do not display any similar pattern, except very feebly on the 

 dorsal. 



Synodontis ovidius, sp. n. 



Native name "Nsinzi." 



Locality. Mukimbungu. 



One specimen, 31 cm. in total length (caudal included). 



A Synodontis related in some degree to S. longirostris, 

 Blgr., and S. lubeo, Grthr., but quite different from both. 



Depth of body 4£ times in total length, head 2|. Head 

 about 1^ times as long as broad, rugose above from between 

 the eyes and backwards. Snout 2\ as long as postocular part 

 of head, terminating in a globular swelling, which is con- 

 tinued nearly to the base of the maxillary barbel. Eye 

 supero-lateral, 9 times in length of head, 2£ times in inter- 

 orbital width. Lips very strongly developed, beset with 

 numerous papillae. Along the upper lip a continuous row of 

 much enlarged papilla? is especially striking. Chin swollen, 

 forming a thick pad. Pisemaxillary teeth arranged in two 

 rows, about 13 in the interior and about 7 in the exterior. 

 These rows are rather close together, but there is an inter- 

 space between the single teeth. The movable mandibular 

 teeth appear at the first look to be 16 in number, rather long, 

 about \ the diameter of the eye, but a closer examination 

 reveals some more between and behind the others, so that the 



