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30. Arius brevirostris Steind. 
Arius brevirostris Steindachner, Abh. Senckenb. Naturf. Gesellsch. XXV. 1901, 
P- 447- 
Dries 725 POs «AO! 
The dorsal profile of head ascends in a convex line from 
anterior end of head regularly to dorsal. Snout and front 
transversely slightly convex, occipital part more strongly so, 
mesially carinated on occiput and granulated as the front. 
Cleft of mouth transverse, slightly curved, broad. Upperborder 
of mouth scarcely prominent above the lower. Nostrils large, 
those of one side separated by a cutaneous fold. Occipital 
process with its base slightly broader than it is long, exten- 
ding to the narrow, semilunar basal bone of dorsal spine, 
where it is truncated with a slight curve. Head about 3°%/,. 
Eye 5, snout somewhat more than 3'/,, breadth of cleft of 
mouth more than 17/,, height below origin of dorsal 11/,, at 
caudal peduncle 3, length of pectorals as also that of caudal 
and height of dorsal 1 in head. The band of teeth on the 
palate narrow, curved, mesially separated by a small inter- 
space. Each of the two halves has one constriction. The teeth 
are very small, granular, whereas those in the jaws are fine 
and villiform. Length of maxillary barbels about 2'/, times in 
length of body. Outer mandibulary barbels slightly more than 
once in length of head. The maxillary barbels extend with their 
point nearly to posterior end of pectorals. The spine of dorsal 
and pectoral is strong, flexible towards its end, and only weakly 
and sparingly denticulated at its posterior border. Length of base 
of anal somewhat more than 1'/,, that of the dorsal about 2'/,, 
that of the adipose fin about 2%/, in length of head. Adipose 
fin orginates at some distance behind vertical through origin 
of anal and ends shortly before end of anal. Ventrals half as long 
as head and reaching with their point to begin of anal. Caudal 
deeply crescentic, the median rays about half as long as the 
longest of the slender lobes. Sides of head and trunk above 
plumbaceous, below silvery. Upper side of head with yellowish 
green metallic hue. Barbels, rays of pectorals (with exception 
of their spine) and anal, lower half of anal and margin of 
caudal, dark greyish violet. Length of the single specimen 
73 mm. [Translated from Steindachner, not seen by us]. 
Habitat: Borneo (Baram river). 
