On a new Silurid Fish from Cameroon. 447 
LVI.—Description of a new Silurid Fish of the Genus 
Anoplopterus, from Cameroon. By G. A. BOULENGER, 
Lie] aa 
Anoplopterus longirostris. 
Depth of body 9 times in total length, length of head 
4 times. Head longer than broad; eyes small, in the second 
half of the head, two diameters apart; interocular width 2 
length of snout, which is rounded and projects a little beyond 
lower jaw; posterior nostril midway between eye and end of 
snout; maxillary barbel ? length of head, reaching root of 
pectoral ; mandibular barbel } length of head. Dorsal I 6, 
nearer end of snout than root of caudal, first ray 2 length of 
head. Adipose short, as long as dorsal. Anal 15, midway 
between root of ventral and root of caudal. Pectoral a little 
longer than ventral, 2 length of head. Caudal forked. 
Caudal peduncle 15 as long as deep. Dark olive-brown 
above, mottled with black, white beneath; dorsal, pectorals, 
and ventrals light, with two transverse series of blackish 
spots ; caudal whitish, with some black spots, black at the 
base, with a large black blotch on each lobe. 
Total length 77 millim. 
A single specimen from hills in the Bulu country, some 
75 miles in the interior from Batanga, at an altitude of 
between 1500 and 2000 feet; collected by Mr. G. L. Bates. 
This is the third species of the genus Anoplopterus, Pfeffer 
(Chimarrhoglanis, Vaillant) *. The principal distinctive 
characters of the three species are here given :— 
A, uranoscopus, Pfeff.—Head more than 5 times in total 
length; maxillary barbel reaching halfway between head 
and dorsal fin; adipose fin longer than dorsal; caudal 
peduncle as deep as long. 
A. platychir, Gthr.—Head about 4 times in total length ; 
interocular width about 2 length of snout; maxillary barbel 
extending to end of head; adipose fin longer than dorsal; 
caudal peduncle longer than deep. 
A. longirostris, Blgr.—Head 4 times in total length ; inter- 
ocular width 3 length of snout; maxillary barbel extending 
to base of pectoral; adipose fin longer than dorsal; caudal 
peduncle longer than deep. 
With reference to a note published in a recent number of 
the ‘ Zoologischer Anzeiger’ (xxiv. p. 569), I must repeat 
* Cf. Boulenger, Ann. & Mag. Nat. Hist. (7) i. 1898, p. 254. 
