Freshwater Fishes from Wi si Africa. 425 



dorsal spine, 42 to 4G louncl middle of body. Greyish brown 

 al)ovo, with 7 or 8 black bars across the back, and a series of 

 11 \o 13 squarish i)lack spots along each side, with smalh-r 

 and indre irregular ones below ; tins spotted and nvjttlt d with 

 blackish. 



Tlirce specimens, measurinp: from 180 to 205 mm., were 

 obtained in June last at Tchitoli, on the River C'orbal, Portu- 

 guese Guinea, by Dr. W. J. Ansorge; one of them has been 

 presented by him to the British Museum. 



Poli/pterus onsorg'n occuj)ie3 a position intermediate be- 

 tween Sections I. and II. of the synopsis given by me in the 

 first volume of the British Museum ' Catalogue of African 

 Freshwater Fishes,' but is on the whole nearer the first. 

 The only described species with which it need be compared 

 are P. congicus and P. endlicheri, in both of which the lower 

 jaw projects distinctly beyond the snout. 



Along with the specimens of the new species Dr. Ansorge 

 obtained at tiie same place several young Poh/pterus palmas, 

 Ayres, measuring 80 to 100 mm., with VIII or IX dorsal 

 s|)ines, and more or less developed external gills. 



Gn( thonemus briicii. 



Depth of body 3 times in total length, length of head 4^ 

 times. Head as long as deep, with curved upper profile ; 

 snout ^ length of head ; teeth conical, 5 in upper jaw, 6 in 

 lower; chin with feeble globular swelling ; eye § length of 

 snout, }, interorbiful width. Dorsal 25, originating above 

 fifth ray of anal, its length ^ its distance from head. Anal 

 30, nearer base of caudal than base of ventral. Pectoral 

 pointed, a little shorter than head, extending to base of 

 ventral. Caudal § scaled, with moderately long pointed 

 lobes. Caudal peduncle twice as long as deep. 60 scales in 

 lateral line, j^ in transverse series on body, J^ in transverse 

 series between dorsal and anal, 12 round caudal peduncle. 

 Brown (dirty greenish in life), darker above, paler below; 

 fins dark brown. 



Total length 150 mm. 



A single specimen from the Ogun River at Aro, S. Nigeria, 

 interior of Lagos, obtained in December by Major G. E. 

 Bruce, and presented by him to the British Museum. 



Most nearly related to G. angolensis, Blgr., from Angola, 

 which has a larger eye, fewer scales in a transverse series on 

 the body, and a more slender caudal peduncle. 



Labeo ogunenst's. 

 Body rather strongly compressed, its depth 3| to 4 times 



