POLTPTEEUS. 



13 



overlapping when folded. Anal 15. Pectoral widely separated from 

 first dorsal spine. 62-63 scales in a longitudinal series, 24-25 between 

 occiput and first dorsal spine, 42 round middle of body. Olive above, 

 with ill-defined light spots, whitish beneath ; lips and gill-membrane 

 spotted with black ; dorsal fin spotted with black ; pectorals, ventrals, 

 anal, and caudal barred with black. 



Total lengtli 370 millim. 



Upper Congo (Monsembe and Kassai River). 

 1- Type. Monsembe. Rev. J. H. Weeks (P.). 



7. POLYPTERUS DELHEZI. 

 Bonlenpr. Ann. Mus. Congo, Zool. i. p. 61, pi. xxx. fig. 2 (1890), and Poiss. Bass. 

 Congo, p. 23 (1901) ; Pellegr. Bull. Mus. Paris, 1904, p. 310. 



Body feebly compressed, subcylindrical. Head If to If times as long 

 as broad, 5 J to 6 times in total lengtli, with lateral eyes and feebly 

 convex interorbital region ; jaws equal in front; eye 7 J times in length 

 of head, IJ times in interorbital width ; head-shields all paired; a series 

 of 3 shields between postorbital and spiracular shields ; suboperculum 

 as large as eye, or a little larger. Dorsal with X-XI spines, not 



Pig. 9. 





^"'^ss^-??^^ ^^^\ ^\ s>^ r^>v ?^- ?"~ '^-"^v ^-X 



J."" ? '> '' ■" ', V *>;'U 



t^^^j^ "^'^T^z/y^^ 



Poljipierus delhezi. 

 Type (A. M. C). f. 



overlapping when folded. Anal 11. Pectoral reaching or not quite 

 reaching vertical of first dorsal spine. 56 scales in a longitudinal series, 

 14-17 between occiput and first dorsal spine, 38 round middle of body. 

 Brownish above, whitish beneath ; 7 black transverse bands on the back ; 

 fins mottled with dark brown. 

 Total length 340 millim. 



