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 Wolffit 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. Genova, XVI. 1880, p. 171. 
Macrones Wolfii Vaillant, Notes Leyden Mus. XXIV. 1902, p. 54. 
B.28-—-9;; Dit 77 TAS 14 wes oe eee: 
Oblong, profile from dorsal to rounded, prominent snout 
sloping down in a straight line. Head conical. Mouthopening 
crescentic. Height 4—4"'/,, head somewhat more, its greatest 
width about 1'/, 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. 
Eye 3'/,—4'/,. 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). 
