OF FISHES FROM LAKE TANGANYIKA. 93 
Pale brownish, with a few round darker spots; a blackish opercular spot; a shining 
golden spot on the subopercle ; dorsal greyish, other fins yellowish. 
Total length 105 millim. 
Two specimens.—Native name: “ Lufuina.” 
12. Tinapra LaBrata Bler. 
Native name: ‘‘ Kobo.” 
15. TILAPIA DARDENNII, sp. n. (Plate XX. fig. 1.) 
Teeth very small, in 4 or 5 series in both jaws, outer bicuspid, separated from 
the series of smaller tricuspid teeth by a rather wide interspace. Depth of body 3 to 34 
times in total length, length of head 53 to 53. Snout with strongly curved upper 
profile, little longer than the diameter of the eye, which is 33 times in length of head 
and equal to or a little Jess than interorbital width; mouth small, 2 width of head, 
extending to between nostril and eye; 5 or 6 series of scales on the cheek; large scales 
on the opercle. Gill-rakers short and thick, 13 on.lower part of anterior arch. 
Dorsal XIX 10; sixth to ninth spines longest, not quite half length of head, a little 
shorter than longest soft rays. Pectoral acutely pointed, as long as or slightly shorter 
than the head, not extending to origin of anal. Ventral reaching vent or not quite so 
far. Anal III 8; third spine as long as and much stronger than longest dorsals. 
Caudal feebly emarginate. Caudal peduncle 13 or 14 as long as deep. Scales mostly 
ctenoid, 37 ae lat. 1. am Yellowish olive above, silvery beneath, with 10 or 11 dark 
dorsal cross-bars, the first between the eyes; yellowish streaks along the series of 
scales ; fins yellowish, dorsal with some olive marblings, pectoral and anal red at the 
base. 
Total length 155 millim. 
Two specimens.—Native name: “ Sangani.” 
14. TILAPIA RUBROPUNCTATA, sp. n. (Plate XX. fig. 2.) 
Teeth very small, in 4 or d series in both jaws, outer bicuspid, separated from the 
series of smaller tricuspid teeth by a rather wide interspace. Depth of body 3 times 
in total length, length of head 2%. Snout with straight upper profile, twice as long as 
diameter of eye, which is 44 times in length of head and equals interorbital width ; 
mouth large, # width of head, extending to between nostril and eye; a few deciduous 
scales on the cheek; large scales on the opercle. Gill-rakers short, rather slender, 12 
or 13 on lower part of anterior arch. Dorsal XVI 9; spines equal in length from the 
