356 



margin, other fins brownish. Length 120 mm. [Type and 

 specimens of Bleeker's collection in the Leyden Museum seen 

 by us]. 



Nomen indig. : Tengkrian (Mahakam). 



Habitat: Java; Sumatra (Palembang!, Djambi!, Lahat); 

 Borneo (rivers Kapuas, Mahakam, Seminis). Malacca. 



In rivers. 



4. Leiocassis poecilopterus (C. V.). 



Bagrus poecilopterus Cuvier & Valenciennes, Hist. Nat. Poissons XIV. 1839, p. 431. 

 Leiocassis poecilopterus Bleeker, Ichth. Arch. Ind. Prodr. I. Siluri, 1858, p. 140. 



Atl. Ichth. II. 1862, p. 53. 

 Liocassis poecilopterus Gunther, Cat. Brit. Mus. V. 1864, p. 89. 



B. 10 n; D. I. 7; A. 1516; P. I. 78; V. 6. 



Rather robust, dorsal profile of head straight, slightly con- 

 vex behind head to dorsal. Height 3 2 / 5 4, head 3 <2 / 5 3 2 / 3 , 

 covered by soft skin, its height equal to its breadth but much 

 less than its length, concealing the narrow, triangular occipital 

 process, which is about twice as long as broad at its base, 

 touching the narrow, prolonged, triangular basal bone of the 

 dorsal spine. Eye nearly 6, situated at the end of the anterior 

 half of the head, more than twice in the prominent, conical 

 snout, which is much longer than the interorbital space. Bar- 

 bels very slender. Nasal barbels reaching to middle of eye, 

 maxillary barbels to hindborder of eye, mandibulary barbels 

 shorter, mental ones still shorter. Height of dorsal 2 / 3 of head, its 

 strong spine equal to head without snout, strongly denticulated 

 behind. Base of adipose fin about ! / 4 longer than that of 

 dorsal, its distance from dorsal nearly equal to its own length. 

 Height of the rounded anal slightly less than that of the 

 dorsal, its origin before that of adipose fin. The very strong 

 pectoral spine scarcely longer than the dorsal one, strongly 

 denticulated behind. Ventrals not reaching anal, their origin 

 somewhat behind end of dorsal. Caudal deeply forked, its 

 lobes rounded. Least height of caudal peduncle about i 1 / 2 

 times in its length. Teeth in upper jaw in a nearly straight, 

 rather broad band, in the lower jaw and on the palate in a 

 strongly curved band. Darkish brown, lighter below. An occi- 

 pital and a dorso-ventral irregular lighter crossband as well 

 as one on the caudal peduncle. Fins with dark bands. Length 

 over 1 80 mm. 



