478 On a new Fish of the Genus Barbus. 
LIV.—Description of a new Fish of the Genus Barbus from 
the Niger. By G. A. BOULENGER, F.R.S. 
(Published by permission of the Trustees of the British Museum.) 
Barbus francisct, 
Depth of body 3} times in total length, length of head 4 
times. Snout rounded, a little shorter than the eye, which 
is 3 times in length of head and equals interorbital width ; 
mouth subinferior, small ; lips feebly developed ; two barbels 
ou each side, anterior ? diameter of eye, posterior 2. Dorsal 
ILL 8, equally distant from anterior border of eye and from 
caudal, border scarcely concave; last simple ray not enlarged, 
not serrated, as long as head. Anal III 5, not reaching 
caudal. Pectoral # length of head, not reaching ventral ; 
base of latter below anterior rays of dorsal. Caudal peduncle 
slightly longer than deep. Scales radiately striated, 23 op 23 
between lateral line and ventral, 12 round caudal peduncle. 
Silvery, back yellowish olive; dorsal and caudal yellow, 
blackish at the tips. 
Total length 63 mm. 
A single specimen from Mutum Biu, 90 miles east of Ibi, 
S. Nigeria, in a tributary of the Benue River; presented to 
the British Museum by Mr. Claude Francis. 
The Hausa name of this fish is  Dendskuri.” 
B. perince, Riipp., from the Nile, is the nearest ally of this 
new species, which is readily distinguished by the narrower 
interorbital region and fewer scales in the lateral line. 
The collection made by Mr. Francis in the Benue River 
contains an example, from Ibi, of Pelmatochromis intermedius, 
Blgr., recently described from Sierra Leone. 
LV.—Two new Muridx from South America. 
By OvprieLp THOMAS. 
(Published by permission of the Trustees of the British Museum.) 
Oxymycterus doris, sp. 0. 
A dark brown species, with no red either on back or sides. 
Size fairly large, about as in VU. inca, Fur rather thin 
and straight, not shaggy, hairs of back about 11 mm. in 
ene ee ee Ss ee ee 
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