314 
bulary barbels to the base of the pectorals, the mental ones 
extending farther than the gillopening. Height of dorsal more 
than height of body and twice its base; strong dorsal spine 
4/, of the head, its frontborder rough in its lower half, slightly 
dentated in its upper half, hindborder strongly serrated. Base 
of adipose fin equal to that of the dorsal and not more than 
twice in its distance from it. Anal emarginate, not much 
higher than long, '/, longer than the adipose fin. Ventrals 
shorter than pectorals, which go 1'/, in length of head; pectoral 
spine as long as or a little longer and stronger than the 
dorsal spine, serrated on both borders. Caudal forked. The 
short, pointed teeth form in the upper jaw a slightly arcuate 
band, the length of which is 5 times its breadth; in the lower 
jaw they form a semicircle, with a narrow median interruption. 
The villiform teeth on the palate in two separate, subtriangular 
patches with an anterior point, about as broad as the eye. 
Uniform brown. Length 125 mm. (without C.). [After Vinci- 
guerra, not seen by us]. 
Habitat: Borneo (Sarawak). 
29. Arius venosus C. V. 
> Arius sumatranus Bennett, Cat. Zool, Spec. in Life of Raffles, 4°. 1830, p. 691 
(insufficient description). 
Arius venosus Cuvier & Valenciennes, Hist. Nat. Poiss. XV. 1840, p. 69. 
Arius micronotacanthus Bleeker, Nat. & Geneesk. Arch. Ned. Ind. III (2). 1846, 
ps Loz: 
Arius manjong Bleeker, Nat. & Geneesk. Arch. Ned. Ind. III (2). 1846, p. 163. 
Arius macruropterygius Bleeker, Nat. & Geneesk. Arch. Ned. Ind. III (2). 1846, 
p- 164. 
Arius micruropterygius Bleeker, Nat. & Geneesk. Arch. Ned. Ind. III (2). 1846, 
p-. 164. 
Arius laeviceps, Bleeker, Nat. & Geneesk. Arch. Ned. Ind. III (2). 1846, p. 165. 
Arius venosus Bleeker, Nat. & Geneesk. Arch, Ned. Ind. III (2). 1846, p. 165. 
Cephalocassis venosus Bleeker, Ichth. Arch. Ind. Prodr. I. Siluri, 1858, p. 113. 
Arius venosus Bleeker, Atl. Ichth. Il. 1862, p. 33. 
Arius venosus Giinther, Cat. Brit. Mus. V. 1864, p. 159. 
Arius sumatranus Giinther, Cat. Brit. Mus. V. 1864, p. 162. 
Arius sumatranus Day, Fishes of India 4°. 1878—1888, p. 460. 
Arius venosus Day, Fishes of India 4°. 1878—1888, p. 460. 
Arius venosus Duncker, Mitth. Naturh. Mus. Hamburg, XXI. 1904, p. 174. 
Tachysurus venosus Seale, Philippine Journ, Science V. 1910, p. 266. 
B63: De 1.97 Ae 18 — 236 kG eee 
Elongate. Height about 5; head about 4, its greatest width 
1'/, or 1'/, in its length. Crown of head nearly smooth, few 
