248 C1CHL1D.E. 



Depth of body 'l\ to 3 limes in total length, length of head 3 to 3| 

 times. Head 2 to 2^ times as long as broad; snout with straight 

 upper profile, as long as broad, as long as postocular part of head ; eye 

 3£ to 3J times in length of head, equal to or a little greater than inter- 

 orbital width, and greater than praeorbital depth; mouth rather small, 

 \ to f- width of head, extending to below nostril or to between nostril 

 and eye ; teeth rather small, in 3 or 4 series, 30 to 40 in outer series of 

 upper jaw ; 3 or 4 series of scales on the cheek, width of scaly part less 

 than diameter of eye. Gill-rakers short, 10 to 12 on lower part of 

 anterior arch. Dorsal XV-XVIII 11-12 ; spines increasing in length 

 to the last, which is a little less than \ length of head ; longest soft rays 

 | length of head. Anal HI 8-10 ; third spine a little shorter than last 



Pi R . 166. 



«^^ 



--^^x^ 





.«K*K- 



-i?.-.;«;.--V ; '.'- ,>,/""'""- 



Tila'pia pleurotcenia. 

 Type (Tr. Z. S. 1901). 



dorsal. Pectoral a little shorter than head, not reaching origin of anal. 

 Ventral reaching vent or a little beyond. Caudal with rather deep 

 notch ; rays free from scales. Caudal peduncle 1 J times as long as deep. 



3.1-4 . 22— '2i 



Scales cycloid or very finely denticulate, 32-35 ^_ 12 ', lateral lines Jq^ 5 - 

 Brownish above, whitish beneath ; a blackish lateral band along the 

 body, from the operculum to the root of the caudal ; fins greyish, soft 

 dorsal and caudal with small round white spots. 



Total length 110 millim. 



Lake Tanganyika and Rusisi River. 



1-6. Types. N. end of L. Tanganyika. Prof. J. E. S. Moore (C). 



7. Skel. ,, ,, ., 



8-12. Types. Rusisi R. 



