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. Indie, V. 1853, p. 515. - 



Ichth. Arch. Ind. Prodr. I. Siluri, 1858, p. 136. 

 Pseudobagrichthys macropterus Bleeker, Atl. Ichth. II. 1862, p. 50. 

 Bagroides macropterns Giinther, Cat. Brit. Mus. V. 1864, p. 91. 



B. 7; D. I. 7; A. 1415; P. I. 95 V. 6. 



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, i ! / 3 or i ! / 4 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 



