3H 



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 / 5 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, ] / 3 longer than the adipose fin. Ventrals 

 shorter than pectorals, which go i ] / 2 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. Ill (2). 1846, 



p. 162. 



Arius manjong Bleeker, Nat. & Geneesk. Arch. Ned. Ind. Ill (2). 1846, p. 163. 

 Arius macruropterygius Bleeker, Nat. & Geneesk. Arch. Ned. Ind. Ill (2). 1846, 



p. 164. 

 Aritis micruropterygius Bleeker, Nat. Geneesk. Arch. Ned. Ind. Ill (2). 1846, 



p. 164. 



Arius laeviceps^ Bleeker, Nat. & Geneesk. Arch. Ned. Ind. Ill (2). 1846, p. 165. 

 Arius venosus Bleeker, Nat. & Geneesk. Arch. Ned. Ind. Ill (2). 1846, p. 165. 

 Ccphalocassis venosus Bleeker, Ichth. Arch. Ind. Prodr. I. Siluri, 1858, p. 113. 

 Arius venosus Bleeker, Atl. Ichth. II. 1862, p. 33. 

 Arius venosus Gunther, Cat. Brit. Mus. V. 1864, p. 159. 

 Arius sumatranus Gunther, Cat. Brit. Mus. V. 1864, p. 162. 

 Arius sumatranus Day, Fishes of India 4. 1878 1 888, 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 Scale, Philippine Journ. Science V. 1910, p. 266. 



B. 6; D. i. 7; A. 1823; P- I- 10; V. 6. 

 Elongate. Height about 5 ; head about 4, its greatest width 

 i ! /4 or i'/ 3 in its length. Crown of head nearly smooth, few 



