572 MB. G. A. BOTJLENG-EB Oi\ T A COLLECTION 



length of head; median soft rays produced, longer than head. Anal III 11 ; spines 

 stronger but shorter than dorsals, third ^ length of head ; median soft rays produced, 

 like the dorsals. Pectoral acutely pointed, as long as head, not reaching origin of 

 anal. Ventral reaching vent. Caudal peduncle deeper than long. Caudal truncate, 

 slightly emarginate. Scales finely denticulate, 32 ^; lateral lines ^. Olive-green 



above, the scales outlined with black, bluish green to white beneath ; cheek and 

 opercle mottled green and blue, with some black ; a black opercular spot ; dorsal 

 black, with regular large round blue spots, towards the edge turning to yellow with 

 white spots; anal and caudal similarly coloured, but the spots less distinct; pectorals 

 brown, ventrals grey. 



Total length 260 millim. 



A single specimen from Kituta. Native name : Ntunka. 



This fine Tilapia is allied to T. melanopleura A. Dura, (lata Gthr.), but the inter- 

 orbital space is considerably broader, there are 11 soft rays in the anal instead of 9 

 or 10, and the markings on the fins are different. 



70. Tilapia horii Gthr. 



Two adult specimens, measuring 140 millim., from Niamkolo, native name Songa 

 Matete, and one young, measuring 75 millim., from Surabu, native name Kilomo. 

 Two of these specimens have 8 soft rays in the anal fin. I no longer regard T. rubro- 

 punctata Blgr. as separable from T horii. 



71. Tilapia daedennii Blgr. 



Five specimens, measuring 175 to 240 millim., from Niamkolo. Native names : 

 Sangani, Nkungula, Masangano. 



Females have the mouth and pharynx filled with eggs, 5 or 6 millim. in diameter. 



72. Tilapia labiata Blgr. 



Three specimens, measuring 330, 190, and 95 millim. respectively; two from 

 Niamkolo and one from the Kakonde Biver, running into Mtondwe Bay. Native 

 name : Kawbo or Lafwa. 



All three specimens have the produced lips characteristic of the species. Dorsal 

 XVII 10-11 ; Anal III 7 ; 16 to 20 gill-rakers on lower part of anterior arch. Dorsal 

 and anal with round reddish-yellow spots between the soft rays ; a yellow spot on the 

 middle of the ventral. 



73. Tilapia microlepis Blgr. 



Two specimens, measuring 285 and 265 millim. respectively, from Niamkolo. Native 

 name : Kupi or Kuhi. 



