546 ME. G. A. BOULENGEE ON A COLLECTION 



Nile. It differs from the first in the mouth being a little more anterior, in the shorter 

 dorsal fin with 31-34 rays instead of 34-36, and in the depth of the caudal peduncle 

 being contained less than twice and a half in its length ; from the second in the 

 caudal peduncle being more than twice as long as deep and surrounded by 12 scales 

 instead of 14. 



4. MoEMTKUS LONGmosTEis Peters. 



A single specimen, 330 millim. long, from Sumbu. Native name: Domodomo. 

 Said to grow to nearly three feet. Dorsal 75, 5J times as long as anal; anal 18; 

 26 scales round caudal peduncle. Dr. Cunnington describes the coloration as " Grey 

 above, lighter to white below, darker on top of head, with darker blotches along 

 middle of side ; tail darker, with some patches of red ; two brown spots below the eye ; 

 ventrals reddish, grey distally." 



M. longirostris, which is known from the Zambesi and the Congo, is so closely 

 related to M. caschive, from the Nile, that it should perhaps be regarded as merely a 

 variety of the latter. 



Clupeid^. 



5. Pellondla miodon, sp. n, (Plate XXX. fig. 2.) 



Depth of body 4f to 5J times in the total length, length of head 3f to 4 times. 

 Snout obtusely pointed, as long as the eye, the diameter of which is contained 

 3-g- to S-g- times in length of head and equals once and \ to once and f interorbital 

 width ; chin projecting beyond the snout ; maxillary extending to below anterior 

 border or anterior fourth of eye ; teeth small, canines confined to anterior extremity of 

 mandible. Gill-rakers long and slender, closely set, 35 to 40 on lower part of anterior 

 arch. Dorsal 15-16, equally distant from centre or posterior border of eye and from 

 root of caudal; longest rays about ^ length of head. Anal 16-17, a long way behind 

 the dorsal, nearer to root of caudal than to base of ventrals. Pectoral f length of 

 head, widely separated from the ventral. Ventral inserted below anterior third or 

 middle of dorsal. Caudal deeply forked, with pointed lobes. Caudal peduncle once 

 and -J to once and | as long as deep. 45 to 48 scales in a longitudinal series, 14 in 

 a transverse series; 19 or 20 keeled scutes between isthmus and ventrals, 10 or 11 

 between ventrals and anal. Olive above; silvery below, with a blue indistinct lateral 

 band ; dorsal and caudal greyish, other fins white. 



Total length 140 millim. 



Several specimens from Ndanvie, Tembwi, Vua, Mbete, Niamkolo Id., and Kasakalawa. 

 Native names : Lumbu, Sembe, and Dagaa. This is, no doubt, the little fish " very like 

 Whitebait " mentioned by Livingtone (' Last Journals,' vol. ii. p. 17) as the Dagala or 

 Nsipe of Lake Tanganyika, which, in my previous ignorance of any sort of Clupeid in 



