2i4: CICHLID^. 



length. Head twice as long as broad, upper profile forming a strong 

 curve; snout broader than long, shorter than postocular part of head, 

 as long as eye, which is 3^ times in length of head and slightly exceeds 

 interorbital width or least depth of prseorbital ; mouth moderately large, 

 f width of head, extending to below anterior border of eye ; teeth in 

 6 series, outer moderately large, 40 in upper jaw ; 3 or 4 series of scales 

 on the cheek, width of scaly part less than diameter of eye. Gill-rakers 

 short, 8 on lower part of anterior arch. Dorsal XVII 9 ; last spine 

 longest, not quite ^ length of head, f longest soft rays. ■ Anal III 8 ; 



;®S- 



Tilapia Iwingstonii. 

 Type (P. Z. S. 1899). 



third spine a little shorter than last dorsal. Pectoral f length of head 

 not extending to origin of anal. Ventral reaching origin of anal. 

 Caudal rounded. Caudal peduncle as long as deep. Scales strono-ly 

 denticulate, 38 -j^ ; lateral lines fjl^. Brownish above, with 7 dark 

 bars, the first on the nape, the penultimate on the caudal peduncle, 

 the last at the root of the caudal fin ; two round white spots on the 

 anal fin. 



'J'otal length 73 millim. 



Zambesi (?). 



1- Type. Zambesi Expedition. Dr. Livingstone (C.) ; 



Earl Russell (P.). 

 76. TILAPIA ZEBRA. 



Boulenfi. Proc. Zool. Soc. 1899, p. 137, pi. xii. fig. 2 ; Pellegr. Mem. Soc Zool 

 France, xvi. 190-1, p. 343. 



Depth of body 2| times in total length, length of head 3| times. 

 Head If times as long as broad ; snout with straight upper profile, 

 much broader than long, a little shorter than postocular part of head,' 

 1^ diameters of eye, which is 4 times in length of head, 1^ times in 



