285 
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 
Decco 
weakly serrated at both borders. Caudal a, ao? 
deeply forked, with more or less rounded 2333 sae 
lobes, the upper one the longer. Villiform “$23 a 
teeth in the jaws. Far back on~the*palate ie pe 
thick granular teeth in two separate, parallel, _,,. ik 
ig. 113. Arzus ma- 
semioval patches. 14 conical, stiff, short gill- cadatws(Thunb.) Teeth 
rakers, longest equal to pupil. Silvery, bluish Ke ates re aoe 
brown above, belly and underside of head ay ae 
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. 
Pseudarius microcephalus Bleeker, Atl. Ichth. II. 1862, p. 37. 
Arius microcephalus Giinther, Cat. Brit. Mus. V. 1864, p. 170. 
Arius microcephalus Kner, Novara-Exp. Fische, 1865—1867, p. 312. 
Arius microcephalus Vinciguerra, Ann. Mus. Civ. Genova, XVI. 1880, p. 173. 
Dey een neers yb ..1. to; Ve 8. 
Elongate, height 4'/,—4%/,, head 4—4'/,, broader than high, 
1'/,—1'/, in length, granulated above. Rostrodorsal profile 
convex, occipital process subtriangular, scarcely longer than 
