2 9 



of which is changing and its size increasing with age, as is also 

 the case with the occipital process, -which in youth is short and 

 nearly triangular. Dorsal profile sloping down in a straight line 

 to the broad, bluntly rounded, prominent snout. Eye 7*/ 2 (in 

 a specimen of 330 mm.) to more than 8 (specimen of 405 mm.), 

 with a free orbital margin, about twice in snout, which goes 

 about twice in postorbital part of head. Maxillary barbels 

 reaching on middle of pectorals or farther, mandibulary barbels 

 somewhat farther than base of pectorals, mental ones nearly to 

 hindmargin of gillmembrane. Height of dorsal about equal to 

 head without snout, the osseous part of its strong spine, which 

 has a filamentous prolongation, is granulated at its frontborder, 

 scarcely serrated behind and equal to postorbital part of head or 

 somewhat longer. The base of adipose fin nearly equal to that 

 of the dorsal. About 3 times in its distance from lastnamed, 

 situated above the middle of the anal fin, the middle rays of 

 which are the highest and about equal to the length of its 

 base. Ventrals extending to the origin of anal or on anal. 

 Pectorals falciform, somewhat shorter than 

 head, their strong spine obtusely serrated 

 along both edges, much longer than dorsal 

 spine. Axillary pore not very distinct. 

 Villiform teeth in a narrow, slightly 



( H Bu^te'ethTf arcuated ba d in the jaws; on the palate 

 upper jaw and palate '/,. in two pairs of posteriorly rounded pat- 

 ches; the outer patch is about twice as 



large as the inner one; both are confluent or separated by a 

 very narrow interspace. 9 flattened, stiff gillrakers, the foremost 

 the shortest, the longest much less than ] /2 length of branchial 

 filaments and 2 / 3 of eye. Dark bluish brown above, whitish 

 below. Base of fins reddish, their distal part more or less 

 dark. Length about 450 mm. 



Nomen in dig. : Ikan Kedukan (Malay. Batav.), Kropah 

 (Batav.), Ikan Babukan (Bagan apt api), Ikan Brukan (Banjer- 

 massin), Ikan Bilukan (Sarawak). 



Habitat: Java (Batavia!, Antjol!, Bantam, Surabaya!); 

 Madura; Sumatra (Palembang, Bagan api api!, Deli!); Singa- 

 pore!; Banka; Borneo (Singkawang, Sarawak, Baram-river, 

 Balikpapan !, Kota baru !). Pinang, Malacca, British India. 



In sea, rivers and estuaries. 



