399 
Villiform teeth in a narrow, slightly arcuate band in the jaws, 
those on the palate are more conical, in two widely separate, 
small, oval patches, the long axes of which meet anteriorly in 
an acute angle. 7 distant, very short gillrakers. Dark bluish 
above, whitish below, fins whitish, dorsal and caudal with a 
dark border. Length 330 mm. 
Nomen indig.: Gutgut (Djambi). 
Habitat: Java; Sumatra (Palembang, Djambi!); Borneo 
(Pamangkat, Sinkawang). — Pinang, Malacca, Siam. 
In rivers and estuaries. 
25. Arius macronotacanthus Blkr. 
Arius macronotacanthus Bleeker, Nat. & Geneesk. Arch. Ned, III (2). 1846, 
p- 159. — Verh. Bat. Gen. XXII. 1847, Silur. batav. p. 32. 
Arius arius Cantor, Journ. Asiat. Soc. Bengal XVIII. 1850, p. 1240, (fide Giinther), 
Cephalocassis macronotacanthus Bleeker, Ichth. Arch. Ind. Prodr. I. 1858, p. 106. 
Arius macronotacanthus Bleeker, Atl. Ichth. IT. 1862, p. 32. 
Arius macronotacanthus Giinther, Cat. Brit. Mus. V. 1864, p. 169. 
Arius macronotacanthus Volz, Zool. Jahrb. Abth. Syst. X!X. 1903, p. 389. 
BO pee Migs A Toy Paige” Viv6: 
Height 4'/,—4°/,; head about 3'/,, nearly as high as broad, 
its greatest width about equal 
to head without snout, its bony 
shields finely granulated and ru- 
gous. Occipital process with a 
median keel, triangular, about 
as long as broad, its sideborders 
straight, its truncate hindborder 
touching the narrow, semicircular 
basal bone of the dorsal spine. The 
narrow median fontanel begins 
above the hindborder of the eyes 
and reaches nearly to the occi- 
pital crest. Dorsal profile with a 
convexity at the occipital process, 
very gently sloping down to 
the rounded, slightly prominent 
snout. Eye 5'/, (in specimens of 
“ay mai), wee - We eae Arius Roget ee Blkr. X 5/,. 
margin, nearly twice in snout 
and less than thrice in the interorbital space. Maxillary barbels 
