488 cichlid^:. 



to the last, which measures one-third to two-fifths the length of the head ; longest soft 

 rays half to two-thirds the length of the head. Anal fin with 3 spines and 8 to 10 

 soft rays; third spine longest, stronger than the dorsals, one-fourth to one-third the 

 length of the head. Pectoral fin two-thirds to three-fourths the length of the head, 

 reaching the origin of the anal or a little beyond. Ventral fin reaching the origin 

 of the ana] or a little beyond. Caudal fin rounded. Caudal peduncle once and one- 

 fourth to once and a half as long as deep. Scales denticulate, 30-33 j^ia? lateral 



v 19-22 



lines jn;. 



Olive-brown to emerald-green above, silvery below ; sometimes an ill-defined dark 

 lateral stripe, dark cross-bars on the back, and a vertical blackish bar below the eye ; a 

 dark opercular spot ; dorsal and caudal fins greyish or bluish purple, the latter and the 

 soft part of the dorsal fin with small round dark spots ; anal fin yellow or greyish, 

 sometimes bordered with vivid vermilion-red, often with a few large orange ocellar spots, 

 encircled with red, on the posterior part ; ventral fins yellow (females) or black (males) ; 

 iris greyish white to dark brown, or upper half brown and lower half yellowish white. 



Total length 235 millimetres. 



This species inhabits Lake Victoria. It is described from the following specimens 

 obtained by Mr. E. Degen : — 



10 Entebbe, 23.6-11.10.05. 



2 Munyonya, 18.8.05. 



4 Bunjako, 5-14.11.05. 



1 Buganga, 15.11.05. 



Named after the discoverer of the source of the Nile. 



3. PELMATOCHPOMIS FLAVIPINNIS. 



(Plate LXXXIX. fig. 3.) 



Boulenger, Ann. & Mag. N. H. (7) xvii. 1906, p. 441. 



Depth of body equal to length of head, three times in the total length. Head large, 

 with concave upper profile; body deepest at the nape. Snout once and two-thirds the 

 diameter of the eye, which is five times in the length of the head, once and one-fourth 

 in the interorbital width, and once and a half in the depth of the scaly part of the 

 cheek below the eye; lower jaw projecting; mouth directed obliquely upwards; 

 maxillary not extending quite to below the anterior border of the eye ; teeth all 

 unicuspid, in four series in the upper jaw, in three in the lower, outer largest and 

 curved ; six series of scales on the cheek ; large scales on the opercle. Gill-rakers short, 

 9 on lower part of anterior arch. Dorsal fin with 15 spines and 9 soft rays ; spines 



