from the Quanza and Bengo Rivers. 543 



length of head ; adipose eyelid well developed ; interorbital 

 region convex, its width 2§ to 3 times in length of head ; 

 maxillary not extending to below anterior border of eye ; 

 H (I) teeth in upper jaw, 10 (J) in lower ; lower border of 

 second suborbital as long as eye. Gill-rakers long and 

 slender, 15 to 18 on lower part of anterior arch. Dorsal II 8, 

 originating above ventral, at equal distance from end of snout 

 and from caudal, longest ray | to once length of head. 

 Anal III 17-18. Pectoral f to once length of head, not 

 reaching ventral. Caudal forked, with long pointed lobes. 

 Caudal peduncle 1^ to 1^ times as long as deep. Scales 

 37-40 °^i-, 1^ between lateral line and ventral. Steel-blue 

 on the back, silvery-white on the sides and below ; fins 

 greyish, ventrals, anal, and caudal yellow or orange at the 

 base ; pectoral and ventral often with a large black or blackish 

 blotch. 



Numerous specimens, 85 to 270 mm. long, from the 

 Quanza River at Cunga and Dondo, and from the Lucalla 

 River at Lucalla. 



Native name : Kitete. 



Very closely allied to A. macro phthalmas, Gthr. ; dis- 

 tinguished by larger scales (37-40 ^ 3 "f% H, instead of 39-45 



10. Peter sius ansorgii, sp. n. 



Depth of body 2|-2f times in total length, length of head 

 3^ to 4 times. Head as long as deep, with slightly concave 

 upper profile; lower jaw not projecting beyond upper; snout 

 much shorter than eye, which is 2^ to 2§ times in length of 

 head and equals interorbital width ; maxillary extending to 

 below anterior border of eye ; outer premaxillary teeth 4, 

 alternating with those of the inner row, 8 in number; 

 8 teeth in lower jaw. Gill-rakers moderate, 18-20 on lower 

 part of anterior arch. Dorsal II 8, originating above base 

 of ventral, some of the rays produced into long filaments in 

 males. Anal II— III 20-23, pointed in males, median ray 

 produced into a filament. Pectoral as long as or a little 

 shorter than head, reaching or nearly reaching ventral. 

 Caudal forked. Caudal peduncle as long as deep. Scales 

 31-33 %p, l£-2 between lateral line and ventral. Reddish 

 brown above, more red on the sides, approaching vermilion *, 



* This vermilion soon disappeared after staining the spirit in which 

 the specimens were preserved. 



