207 



-<* 



3. Silurodes eugeneiatus (Vaill.). [Fig. 80. p. 205]. 



Callichrous eugeneiatus Vaillant, Bull. Soc. Zool. France XVIII. 1893, p. 61. 

 Callichrons cugenciatus Vaillant, Nouv. Arch. Mus. Hist. Nat. (3) V. 1893. p. 65. 

 Silurodes eugcniatus M. Weber & de Beaufort, In : Maass : Durch Zentral-Sumatra, 

 II. 1912. Fische p. 13. 



B. 9; D. 4; A. 5859; P- I- n; V. 7. 



Height 3 3 / 4 4^, head 5 3 / 4 , eye about 4, somewhat shorter 

 than snout, visible from below, situated behind the corner of 

 the mouth at a distance of ] / 2 eye-diameter, about twice in 

 the convexity of the interorbital space. Upper profile obliquely 

 descending from dorsal to snout, nearly straight, with a super- 

 ficial concavity before the neck. Maxillary barbel extending 

 to the posterior half of anal, mandibulary barbels surpassing 

 the caudal. Dorsal with the first ray prolonged, as long as 

 distance between corner of mouth and hindborder of head, 

 its distance from the end of the snout about 2 ] / 2 times in its 

 distance from the caudal. Anal slightly connected with the 

 base of the caudal, which is deeply forked, its lobes pointed, 

 the superior the longer. Ventrals short. Pectorals longer than 

 head, the osseous part of the spine equals the head without 

 snout and is rather strong. Small villiform teeth in a band on 

 the jaws, a few small teeth in one oval patch on the vomer. 

 12 gillrakers, the longest a little shorter than the branchial 

 filaments. Yellowish, back somewhat darker. A more or less 

 dark spot behind the operculum, a smaller one before the 

 caudal, -both are connected by a dark lateral line. Length 

 165 mm. 



Habitat: Sumatra (Djambi!, Gunung Sahilan !); Borneo 

 (Knapei, Sebruang). 



In rivers. 



6. Callichrous Hamilton Buchanan. 



(HAMILTON BUCHANAN. Fishes of the Ganges 1822, p. 149). 



Ompok Lacepede (diagnosis erronea). 



Compressed, head broad, snout depressed. Cleft of mouth 

 oblique, not surpassing the front edge of the eye, lower jaw 

 prominent. Eyes covered by skin, their lower border on the 

 level of the cleft of the mouth or a little below it. Nostrils 

 remote from each other. A maxillary, and some distance be- 



