349 
anal, their origin behind the end of the dorsal. The strong, 
flat pectoral spine, with the hindborder strongly serrated, 
about equal to that of the dorsal. Caudal deeply forked, with 
pointed lobes. Small teeth in the upper jaw in a quadrangular 
or oval patch, twice as broad as long, those in the lower jaw 
in a semioval patch. Yellowish. Large, irregular, partly ana- 
stomosing black patches on the top of the head, before and 
below the dorsal and adipose fin and on the tail. Lateral line 
yellowish. Fins yellow, distally black. Length 340 mm. 
Nomen indig.: Ikan radja meno (Indragiri), Ikan tetus 
tetus (Djambi). 
Habitat: Sumatra (Palembang!, river Kwantang, Indragiri, 
Djambi!); Borneo (rivers Barito, Kahajan, Kapuas!, Sambas, 
Rajang). — Siam. 
In rivers. 
2. Bagroides macropterus Blkr. 
Bagroides macropterus Bleeker, Nat. Tijdschr. Ned. Indié, V. 1853, p. 515. — 
Ichth. Arch. Ind. Prodr. I. Siluri, 1858, p. 136. 
Pseudobagrichthys macropterus Bleeker, Atl. Ichth. II. 1862, p. 50. 
Lagroides macropterus Giiuther, Cat. Brit. Mus. V. 1864, p. 91. 
igs Oa 7 YN BAS 15 PTs) Qi V6, 
Elongate, compressed. Height about 5; head about 6, conical, 
convex, acute, longer than high and broad. Occipital process 
slender, about thrice longer than broad at its base, convex, 
its slender point touching the elongate, smooth or rugose basal 
bone of the dorsal spine. Eyes about 5, 1'/,; or 1'/, distant. 
Snout less than twice longer than eye, very convex, compressed, 
prominent, acutely rounded. Width of mouth about equal to 
eye. Lips fleshy. Barbels slender, the nasal ones reaching on 
postocular part of head, the maxillary ones on opercle or humeral 
bone, the mandibulary ones to branchial opening, the mental 
ones still shorter. Height of dorsal about equal to height of 
body, about twice its length; its spine moderate, slightly or not 
- longer than head, its hindborder with moderate teeth, directed 
upward. Adipose fin not free behind but adnate to the body, 
beginning very close to dorsal, and more than 4 times longer 
than that fin. Anal convex, lower than body, opposite to median 
part of adipose fin, more than thrice or 4 times longer than 
that fin. Pectoral spine stronger and not longer or slightly 
longer than the dorsal one. Caudal deeply forked, its lobes 
a 
