355 
caudal. Adipose fin and caudal bordered by the same colour. 
Pectorals, ventrals and anal hyaline, lastnamed with a trans- 
verse series of black spots. Dorsal hyaline, sometimes with a 
black submarginal band. Length about 120 mm. [Type in 
Leyden Museum seen by us}. 
Habitat: Borneo (Mahakam river!). 
3. Leiocassis stenomus (C. V.). 
Bagrus stenomus Cuvier & Valenciennes, Hist. Nat. Poissons, XIV. 1839, p. 415. 
Leiocassis Ellenriederi Bleeker, Act. Soc. Sc. Indo-Neerl. VIII. 1860, Negende 
Bijdrage Sumatra, p. Io. 
Leiocassis stenomus Bleeker, Atl. Ichth. II. 1862, p. 54. 
Liocassis stenomus Giinther, Cat. Brit. Mus. V. 1864, p. 90. 
Liocassis stenomus Vaillant, Nouv. Arch. Mus. Hist. Nat. (3) V. 1893, p. 73- 
Liocassis stenomus Popta, Notes Leyden Museum, XXVII. 1906, p. 51. 
Poop eit 7s Aros 7B de 75 V4 6, 
Dorsal profile nearly straight from snout to dorsal. Height 
4°/,; to nearly 6. Head 4—4?/,, broader than high, covered 
by skin. Occipital process triangular, short, about as long as 
broad at its base, reaching or nearly reaching the triangular 
basal bone of dorsal spine. Eye 4—6, nearly twice in the 
rounded, prominent snout, which is about equal to interorbital 
space. Nasal barbels reaching beyond eye or even to hind- 
border of operculum, maxillary and mandibulary ones extending 
to end of pectorals or of humeral process, mental ones to 
humeral process or not so far. Height of dorsal equal to 
head without snout or a little more, its spine equal to or 
more than postorbital part of head, with the hindborder weakly 
serrated. Base of adipose fin longer than that of dorsal, the 
distance between both is about equal to 1'/, times the length 
of the adipose fin. Origin of anal slightly before that of the 
adipose fin. Origin of ventrals, which are far distant from the 
anal, behind the end of the base of the dosal. Pectoral spine 
slightly shorter than the head, with strong denticulations 
along its hindborder. Caudal deeply forked, with the lobes 
produced into filaments. Height of caudal peduncle nearly 
1'/, times in its own length. Teeth in jaws and on palate in 
curved bands. Darkish brown above, lighter below, with lighter 
cross-bands. A narrow one on occiput, a broader one before 
adipose fin and a narrow one at caudal peduncle. Dorsal with 
a black intramarginal band. Adipose fin darkish with a light 
a 
