128 MB. G. A. BOtJLENGER Olf THE AFEICAX AND [Feb. 7, 



a filament, extending beyond origin of anal. Anal III 9 ; third 

 spine a little shorter than longest dorsals. Caudal rounded. 

 Caudal peduncle a little longer than deep. Scales cycloid, 

 29 ^^ ; lat. 1. ^. Olive, a dark opercular spot ; two dark bars 

 across the upper surface of the snout ; a dark streak behind the 

 eye. 

 ' Total length 95 milHm. 

 Lake Tanganyika. 



39, TiLAPIA BFETTIKOFEEI. 



Chromis huttiloferi, Hubreclit, Xotes Leyd. Mus. iii. 1881, p. 66 ; 

 Steind. op. cit. xvi. 1894, p. 39.' 



Teeth rather large (10 on each side in the outer row of the 

 upper jaw). Depth of body 2 to 2| in total length, length of 

 head 3 to 3f . Snout as long as the eye, which is contained 3 

 times in length of head ; 5 or 6 series of scales on the cheek. 

 Gill-rakers short, 11 on lower part of anterior arch. Dorsal XIV- 

 XV 15-16. Pectoral as long as or a little shorter than the bead, 

 not extending so far as origin of anal. Ventral prolonged into a 

 filament, extending beyond origin of anal. Anal HI 10-11. 

 Caudal rounded (?). Scales cycloid, 29-30 ^-^i ; kt. 1. f^|_ g ^j^^.^ 

 bars, the first two across the head, the last two on the caudal 

 peduncle ; these bars a little broader than the spaces between 

 them. 



Total length 105 millim. 



St. Paul's Eiver, Liberia. 



40. TiLAPIA POLTCENTBA. 



Tilapia pohjcentra, A. Dum. Arch. Mus. x. 1859, p. 254. 



Chromis poJy centra, Giinth. Cat. iv. p. 270 (1862). 



Depth of body 2| in total length. 3 series of scales on the 

 cheek. 9 giU-rakers on lower part of anterior arch. Dorsal 

 XVIII 8. Anal III 7. Caudal rounded. Scales cycloid, 

 24 ^. Scales finely dotted with blackish ; soft dorsal with 

 alternating series of dark and light spots and a large black spot in 

 front. 



Total length 100 millim. 



Gorea. 



41. TiLAPIA KIBKI. 



? Ctenochromis strigigena, Pfeffer, Jahrb. Hamb. wiss. Anst. x. 

 1893, p. 155, pi. ii. tigs. 5-8. 



Chromis kirkii, Giinth. Proc. Zool. Soc. 1893, p. 624, pi. Ivi. 

 fig. A (1894). 



? Chromis strigigena, Pfeffer, Thierw. O.-Afr., Fische, p. 18, fig. 

 (1896). 



' I am indebted to Dr. van Lidth de Jeude for notes supplementing the 

 deecriptions quoted. 



