28 5 



considerably shorter, mandibulary barbels to hindborder of 

 gillmembrane, mental barbels much shorter. Height of dorsal 

 longer than head without snout, osseous part of its spine 

 rather strong, somewhat shorter than head without snout, 

 with a filamentous prolongation, granulated in front, serrated 

 behind. Base of adipose fin equal to soft part of dorsal, 

 nearly 4 times in its distance from it; situated about above 

 the middle of the anal, the height of which is less than the 

 length of the ventrals, which extend at least to 

 its origin. Pectorals about as long as postor- 

 bital part of head, osseous part of pectoral 

 spine nearly of equal length, flattened and 

 weakly serrated at both borders. Caudal 

 deeply forked, with more or less rounded 

 lobes, the upper one the longer. Villiform ^9 "^& 

 teeth in the jaws. Far back on the palate ^J, $* 



thick granular teeth in two separate, parallel, Fig. n^. Arius ma- 

 semioval patches. 14 conical, stiff, short gill- culatus (Thunb.) Teeth 

 rakers, longest equal to pupil. Silvery, bluish of alat u e p P er jaw and 

 brown above, belly and underside of head 

 whitish. Fins yellowish, adipose fin with a large black spot. 



Length about 400 mm. 



Nomen indig. : Ikan Manjong pidada, Ikan duri pidada 

 (Malay. Batav.), Ikan lundu (Buluran). 



Habitat: Java (Batavia!, Bantam, Krawang, Surabaya, Pala- 

 buan Batu, Pasuruan, Buluran!); Sumatra (Padang, Palembang!, 

 Bagan api api!); Borneo (Banjermassin !, Prabukarta, Moratabas 

 (Brit. Mus.)). Philippines, Siam, China and Riu Kiu Islands. 



In sea, estuaries and rivers. 



8. Arius microcephalus Blkr. 



Arius microcephalus Bleeker, Nat. Tijdschr. Ned. Ind. IX. 1855, p. 423. - 



Ichth. Arch. Ind. Prodr. I. Siluri, 1858, p. 77. 

 Pseudari^^s microcephalus Bleeker, Atl. Ichth. II. 1862, p. 37. 

 Arius microcephalus Gunther, Cat. Brit. Mus. V. 1864, p. 170. 

 Arius microcephalus Kner, Novara-Exp. Fische, 1865 1867, p. 312. 

 Arius microcephalus Vinciguerra, Ann. Mus. Civ. Geneva, XVI. 1880, p. 173. 



B. 5; D. I. 7; A. 19; P. I. 10; V. 8. 



Elongate, height 4 l / s 4 3 / 4 , head 4 4 J /.v broader than high, 

 i ] / 4 i 1 /. in length, granulated above. Rostrodorsal profile 

 convex, occipital process subtriangular, scarcely longer than 



