TIL API A. 181 



edged with bright ye]h)W, the former with round red spots forming 

 regular series between the rays ; caudal with small round red spots. 



Total length 240 millim. 



Lake Nyassa. 



1-2. Types. L. Nyassfi. Capt. E. L. Rlioadcs (P.). 



3. Skcl. 



21. TILAPIA LEPIDURA. 



Bouleng. Proc. Zool. Soc. 1899, p. IIG, and Poiss. Bass. Coiigo, p. 459 (1901) ; 

 Pelk^gr. Mem. Soc. Zool. France, xvi. 3 90-1, p. 317. 



Depth of body 2|- to 2h times in total length, length of head 2| to 

 3 times. Head If to 1| times as long as broad; snout with convex 



Fig. 116. 



Tilapia Uindura. 

 Type, from Angola. ^. 



upper profile, broader than long, as long as or a little shorter than 

 postocular part of head; eye of to 4 times in length of head, 1| to 

 2 times in interorbital width, equal to or a little less than pneorbital 

 depth ; mouth rather small, f width of head, extending to between 

 nostril and eye ; teeth extremely slender, in 4 series, SO to 88 in outer 

 series of upper jaw ; 2 or 3 series of scales on the cheek, width of scaly 

 part less than diameter of eye. Gill-rakers short, 17 to 20 on lower 

 part of anterior arch. Dorsal XVI 10-12; last spine longest, | to 



13 Bou II/III 



