Mr. G. A. Boulenger on Four new Fishes. 13 
orbital width ; barbels two pairs, posterior a little longer than 
anterior and a little longer than eye. Third dorsal ray very 
strong, bony, not serrated. Longest anal ray ? or # length 
of head. Pectorals not reaching base of ventrals. Ventrals 
below anterior rays of dorsal. Caudal peduncle 13 as long as 
deep. 24 scales between lateral line and root of ventral. 
Dark olive-brown above, lighter beneath, the scales darker at 
the base. 
Total length 260 millim. 
Two specimens from the Albert Edward Nyanza. 
Named in honour of Mr. Malcolm Ferguson, the geologist 
attached to the expedition which has yielded such interesting 
ichthyological results. 
Both this and the preceding species are nearly related to 
B. altianalis, Blgr., from Lake Kivu, and also to some of 
the species described by Riippell from Lake Tana, especially 
B, affinis and B. elongatus. 
OClarias Moorii. 
Allied to C. lazera, OC. & V., C. Robecchii, Vincig., and 
C. anguillaris, Hasselq. (C. Hasselquistiit, C. & V.). 
Agreeing with the first in the closely-set and very numerous 
gill-rakers (80 on the anterior arch), with the second in the 
wide interspace (4 length of head) between the dorsal and 
caudal fins, with the third in the form and disposition of the 
vomerine teeth, which are mostly conical and constitute a long 
erescentic band, which is nowhere wider than the premaxillary 
band. Nasal barbel } length of head; maxillary barbel 3, 
barely reaching base of pectoral spine; occipital process 
acutely pointed, a little longer than broad. D. 66; A. 43. 
‘Total length 590 millim. 
Albert Nyanza. A single specimen. 
Petrochromis Andersonit. 
D. XV113. A.IIL10. Sq. 325. L. lat. 21/18. 
Depth of body 23 times in total length, length of head 3. 
Diameter of eye 4% times in length of head ; mouth extending 
to between nostril and eye; teeth extremely numerous, 
forming very broad bands in both jaws; 3 series of scales on 
the cheek; 25 gill-rakers on lower part of anterior arch. 
Last dorsal spine much longer than middle ones. Pectoral 
much longer than head, reaching a little beyond origin of 
anal. Caudal truncate, very slightly emarginate. Olive 
above, the scales darker at the base; yellowish beneath, 
