340 



opercle, bordered with white in young specimens. Length 145 mm. 



Nomen indig. : Singaringan (Malay. Batavia) ; Ririgi (Ban- 

 tam); Keteng (Bekassi); Enting (Kudus); Sengat (Benkulen); 

 Ikan baung (Palembang); Lundu (Djambi). 



Habitat: Java (Batavia, Bekassi!, Kudus!, Tjiringin, Per- 

 dana, Ambarawa, Kediri, Surabaya, river Brantas, river Man- 

 diku!, Palabuan); Sumatra (Benkulen, Palembang, Padang, 

 Priaman, Lahat, Taluk!, Gunung Sahilan!,. Djambi!, Deli!, 

 Djapura, Bagan Api Api!); Borneo (Putus Sibau on river 

 Kapuas!, Prabukarta, rivers Sambas and Baram). 



In rivers. 



4. Macrones wolffi (Blkr.). 



Bagrus Wolffii Bleeker, Nat. Tijdschr. Ned. Ind. II. 1851, p. 205. Ichth. 



Arch. Ind. Prodr. I. Siluri, 1858, p. 160. 

 Hypselobagrus Wolffii Bleeker, Atl. Ichth. II. 1862, p. 58. 

 Macrones Wolffii Giinther, Cat. Brit. Mus. V. 1864, p. 82. 

 Macrones Wolffii Peters, Monatsber. Akad. Berlin, 1868, p. 271. 

 Macrones Wolffii Vinciguerra, Ann. Mus. Civ. Geneva, XVI. 1880, p. 171. 

 Macrones Wolfii Vaillant, Notes Leyden Mus. XXIV. 1902, p. 54. 



B. 89; D. ii. 7; A. 14; P. i. 9; V. 6. 



Oblong, profile from dorsal to rounded, prominent snout 

 sloping down in a straight line. Head conical. Mouthopening 

 crescentic. Height 4 4 ! / 4 , head somewhat more, its greatest 

 width about I '/ 3 in its length. A median fontanel, nearly 

 reaching to base of narrow occipital process, which extends 

 to the interspinal bone of dorsal. Surface of head finely rugose. 

 E 7 e 3 ! /2 4 ! /r Nasal barbels longer than head, maxillary bar- 

 bels reaching caudal, mandibulary barbels extending on anal, 

 mental ones on pectorals. Dorsal fin pointed, its first ray 

 longer than height of body, its strong, flattened spine, with 

 the hindborder serrated, longer than head without snout. 

 Adipose fin about equal to anal and dorsal and to their 

 distance. Ventrals about as long as head without snout, pec- 

 torals shorter than head, their strong, flattened spine, with the 

 hindborder strongly denticulated, much longer than dorsal 

 spine. Villiform teeth in curved bands, that of the palate the 

 narrowest. Dark violet, underside whitish. Nasal and maxillary 

 barbels blackish, mandibulary and mental ones whitish. Length 

 200 mm. 



Nomen indig.: Singirian (Malay. Banjermassin), Ikan Lundu 

 (Djambi). 



