KXJNGL. SV. VET. AKADEMIENS II \NDUNGAIt. HAND 47. N:0 6. II 



Amphilius grandis Blgr. 



Blgk.: Cat. Fresh Water Fish. Air. II. p. 355. 



A spoeimen from Ttiolii river agrees with the description of this species which 

 is known from Tana and Athi River Systems before. 



Synodontis geledensis Gthr. 



Blgr.: Cat. Fresh Water Fish. Afr. II. p. 458. 



A very fine specimen of this species was caught in Guaso Nyiri some way below 

 Chanler Falls. Even in size it agrees closely with the type specimen viz. measuring 

 275 mm. without caudal. 



The type is described from Webi Schebeli, Somaliland, and it is thus of interesl 

 to find this species in Guaso Nyiri. 



Tilapia nyirica n. sp. 



An outer series of a little larger notched teeth, and about three inner series of 



small tricuspid teeth. Depth of body about 2 3 /s> in total length without caudal (a 



little more than 2 V2 in young specimens) ; length of head not fully 3 times in total 



length in the adult (nearly three times in the young). Snout with straight upper 



profile 3 times in head. Diameter of eye about 1 2 /s times in snout. Interorbital 



width about 3 Va times in length of head. Upper jaw extending beyond nostril, but 



not half way between nostril and eye. 3 series of scales on the cheeks. Large scales 



on opercle. Gillrakers short, 16 — 17 on lower part of anterior arch. Dorsal XVI, 



11 (10); last spine longest about 2 2 /3 in head. Pectoral falciform not quite as long 



as head, not reaching origin of anal. Ventral not reaching vent. Anal III, 9, third 



spine shorter than last dorsal spine. Caudal truncate. Caudal peduncle (a little) 



deeper than long (in the young this is less conspicuous). Scales cycloid, 28 (29) 



3 23 (20) 



jtz; lateral line . Olive above, light below with about a dozen dark cross bars 



1^ lo (9) 



and a dark spöt at the end of the opercle in the young. Out of these crossbands 



8 or 9 are visible in the adult, and so is the dark spöt on the opercle. Young as 



well as adult show more or less plainly wavy dark lines on the dorsal and caudal 



fins. The caudal rays are scaly on their basal half. 



I found this Tilapia rather plentiful in Guaso Nyiri below Chanler Falls, and 



I am not able to identify it with any other species of this genus hitherto described. 



K. S\-. Vet. Akiul. H.-uull. Band 47. N:o 6. 



