OF FISHES FEOM 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. TlLAPIA LABIATA Blgr. 



Native name : " Kobo." 



13. Tilapia dardknnii, 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 3| 

 times in total length, length of head 3J to 3-|. Snout with strongly curved upper 

 profile, little longer than the diameter of the eye, which is 3^ times in length of head 

 and equal to or a little less than interorbital width ; mouth small, f- 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 If or If as long as deep. Scales mostly 



ctenoid, 37 jj ; lat. 1. f^jy. 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 eubropunctata, sp. n. (Plate XX. fig. 2.) 



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 times 

 in total length, length of head 2§. Snout with straight upper profile, twice as long as 

 diameter of eye, which is 4-| 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 



