404 CICHLIDJi. 



19. PELMATOCHROMIS ARNOLDI. 

 Bouleng. Ann. & Mag. N. H. (8) x. 1912, p. 2C3. 



Depth of body 1\ to 2f times in total length, length of head 3 times. 

 Head 1 1 to If times as long as broad; snout rounded, with contave 

 upper profile, much broader than long, as long as eye, which is Z\ to 3§ 

 times in length of head, 1-g- to \\ times in interorbital width, and 

 exceeds prseorbital depth ; mouth moderate, extending to between 

 nostril and eye ; teeth small, in 3 series, 60 to 70 in outer series of 

 upper jaw ; 3 or 4 series of scales on the cheek, width of scaly part equal 

 to diameter of eye. Gill-rakers short, 9 on lower part of anterior arch. 

 Dorsal XY-XV1 10-11, spines gradually increasing in length to the last, 



Fis;. 274. 



Pelmatocltromis arnoldi. 

 Type. 



which measures nearly ^ length of head ; median soft rays produced into 

 filaments, as long as or a little longer than head. Anal 111 8-9 ; third 

 spine as long as or slightly longer than longest dorsal. Pectoral f to -f 

 length of head, not reaching origin of anal. Ventral produced into a 

 filament, extending beyond origin of anal. Caudal rounded. Caudal 

 peduncle deeper than long. Scales cycloid, 28 y^; lateral lines ~_ 

 Brownish or dark olive, with five indistinct dark bars and six large, 

 round, blackish spots on each side, the first being the opercular 

 spot ; fins greyish, soft dorsal, anal, and caudal with numerous small 

 blackish spots. 



Total length 90 millim. 



Lower Niger. 

 1-3. Types. Lower Niger. Mr. J. Paul Arnold (P.) 



