12 
back darker. Anal and caudal margined with brown. Axil of 
pectorals sometimes brown. Sides of body, anal and caudal 
sometimes with smaller or larger brownish spots. Length 430mm. 
[Not seen by us]. 
Habitat: Sumatra (Palembang, Benakat); Borneo (Sambas, 
Pontianak, Kahayan, Baram). 
In freshwater. 
4. Fam. OSTEOGLOSSIDAE. 
Elongate, ventrally compressed. Scales large or very large, 
cycloid, composed of pieces as mosaic, those of the lateral 
line with a single tube. Head scaleless. Mouth bordered by 
the intermaxillaries and the longer maxillaries. Suboperculum 
much reduced, more or less concealed under praeoperculum. 
Teeth differing in genera. Dorsal opposite to anal, both ap- 
proximated to the rounded caudal. Pectorals low down, folding 
against the belly. Ventrals with 5 or 6 rays. Gillopenings 
wide, gillmembranes united at their base, free from isthmus. 
Branchiostegals 7—16. Gillrakers differing in genera. Pseudo- 
branchiae none. 
Fresh water of South America, Africa, Indo-Australian Ar- 
chipelago and Australia. 
I. Scleropages Giinther. 
(GUNTHER. Ann. & Mag. Nat. Hist. XIV. 1864, p. 196). 
Elongate, ventrally compressed in a trenchant edge. Scales 
very large. Cleft of mouth very wide, oblique. Lower jaw 
prominent with a pair of barbels. Maxillary very long, narrow. 
Jaws with a series of small teeth. Villiform teeth on vomer, 
palatines, pterygoids and tongue. Dorsal much shorter than 
anal. A distinct space between caudal and anal. Pectorals 
elongate. Branchiostegals numerous. Gillrakers stout, few in 
number, with a series of protuberances on the innerside of 
first branchial arch. 
Synopsis sorhiens pieces: 
A, Ll. 21—24; L.tr. 21/.—2. Pectorals about 3 times 
in length of (body) %\;0..Mee) sheurn ene Ean ee S. formosus p. 13. 
BL. Ll. 35; L.tr. 3—4. Pectorals more than 4 times 
in) length: of "body (1) 5 4.(515. BGEAStA Ce eoeree eee S. leichhardti p. 14. 
