226 CICHLID.E, 



Caudal rounded, basal half densely scaled. Caudal peduncle slightly 

 longer than deep. Scales finely denticulate, 31 fg; lateral lines y\' 

 Dark brown, with scattered blackish spots ; a blackish opercular spot ; 

 a round blackish spot at the root of the caudal ; fins grey, dorsal 

 and caudal broadly edged with black ; two small round white spots on 

 the posterior part of the anal. 



Total length 105 millim. 



Lake Nyassa. 

 1. Type. L- Nyassa. Mr. J. A. Williams (C). 



GO. TIL APIA STIGMATOGENYS. 

 Bouleng. Rev. Zool. Afr. ii. 191.*^, p. 394. 



Depth of body equal to length of head, 3 times in total length. 

 Head nearly twice as long as broad ; snout rounded, with straight or 

 slio-htly convex upper profile, a little broader than long, as long as or a 

 little shorter than postocular part of head, 1^ to 1^ times diameter of 

 eye, which is 3^ (young) to 4^ times in length of head and equals 



Fig. ]48. 



Tilapia stiijinatoyenij^. 

 Type. 



interorbital width or depth of prseorbital ; mouth about | width of head, 

 extending to below anterior border of eye ; lips thick; teeth in 3 or 4 

 series, outer moderately large and 40 to 50 in upper jaw ; 4 or 5 series 

 of scales on the cheek, width of scaly part equal to diameter of eye. 

 Gill-rakers short, 7-8 on lower part of anterior arch. Dorsal XV 

 (rarely XVI) 9-10 (rarely 8) ; spines equal from the sixth, ^ length of 

 head; longest soft rays | length of head. Anal 111 7 ; third spine as 

 long as dorsals. Pectoral about f length of head, widely separated 



