1849.] Catalogue of Malayan Fishes. 1243 



slightly cleft, and the lobes a little rounded ; their length is \ of 

 the total. The lateral line resembles that of Arius truncatus. At 

 Pinang single individuals occur at all seasons ; they are eaten by the 

 natives, and their air-vessels preserved. 



Gen. Pimelodus, (Lacepede, 1803,) Cuv. and Val. 1840. 



Palate smooth, without teeth ; six or eight cirri ; with or without 

 helmet. 



Pimelodus pectinidens, Cantor. 



Young ? Head above and back yellowish green bronze, dotted with 

 black ; between the anterior points of the helmet an oval yellowish 

 white spot, cheeks, opercles and sides of the body silvery ; the two 

 first minutely dotted with black ; throat and abdomen white ; fins, in- 

 cluding the adipose, yellowish white ; maxillary cirri black ; mandibu- 

 lar pairs white. Iris golden minutely dotted with black. 



D 1/7—1 (adipose), C 15f, A 20, V 6, P 1/8, Br. IV. 



Cirri — 



4 



Habit. — Freshwater, Pinang. 



Total length : 4f inch. 



The greatest vertical diameter of the body, in front of the dorsal fin, 

 is \ of the total length ; from thence the profile descends in a nearly 

 straight line to the rounded muzzle. To the point of the opercle the 

 length of the head is \ of the total, but to the point of the interparietal 

 bone it is 3f . Above the head is depressed, transversely arched, its 

 greatest breadth at the occiput is \ less than its length. The inter- 

 parietal is triangular truncated, its length \ of the distance to the 

 muzzle, its breadth at the base equals its length ; the truncated apex 

 is notched, receiving the point of the second interspinal. The whole 

 of the helmet is finely granulated to above the posterior margin of the 

 orbit. It is longitudinally divided by a furrow terminating a little 

 behind the anterior half of the distance between the muzzle and the 

 dorsal. The suprascapular bone is narrow, pointed, and joins the 

 equilateral triangular humeral. Both as well as the opercles are rough 

 and striated. The size of the opercle equals that of the preopercle and 

 interopercle together. The cheeks are smooth. The mouth is large, 

 the angle reaching to the posterior margin of the orbit ; the fleshy 



