289 
hind, not so high as the soft dorsal. Adipose fin equal to or 
somewhat shorter than dorsal. Pectoral spine stronger and 
usually slightly shorter than that of the dorsal, granulated 
exteriorly and serrated interiorly. Ventral fins much shorter 
than the pectorals, not extending on to the anal. Caudal 
deeply forked. Teeth on palate villiform, in 4 groups, the 
outer ones large, somewhat triangular and emarginate posteri- 
orly, connected together anteriorly by the two small median 
groups. Colours: brownish above, bluish on the sides where 
it is glossed with gold, and dull white beneath. Fins with a 
bluish-black tinge. Young specimens are of a brownish colour, 
glossed above with purplish and yellow, the fins are nearly 
black. Length over 900 mm. [After Giinther and Day; not 
seen by us]. 
Habitat: Singapore (Duncker). 
Through the seas of India to Bombay, entering estuaries 
and tidal waters. 
11. Arius sagor (Ham. Buch.) 
Pimelodus sagor Hamilton Buchanan, Fish. Ganges 1822, p. 169. 
Bagrus sondaicus Cuvier & Valenciennes, Hist. Nat. Poiss. XIV. 1839, p. 444. 
Bagrus javensis Cuvier & Valenciennes, Hist. Nat. Poiss, XIV. 1839, p. 445. 
Bagrus sagor Cuvier & Valenciennes, Hist. Nat. Poiss. XIV. 1839, p. 445. 
Bagrus sondaicus Cantor, Journ. Asiat. Soc. Bengal XVIII. 1850, p. 1237. 
Hexanematichthys sundaicus Bleeker, Ichth. Arch. Ind. Prodr. I. Siluri, 1858, 
p. 127. — Atl. Ichth. II. 1862, p. 26. 
Arius sagor Giinther, Cat. Brit. Mus. V. 1864, p. 141. 
Arius sagor Kner, Noyara-Exp. Fische, 1865—1867, p. 310. 
Arius sagor Day, Fishes of India, 4°. 1878—1888, p. 461. 
Galeichthys sondaicus Fowler, Proc. Acad. Nat. Sc. Philadelphia (2) LVII, 1905, 
Pp. 462. 
Arius sagor Seale, Philippine Journ, Science V. 1910, p. 266. 
Beste 7s As 18—I9;/P. 1.) 01; V. 6: 
Elongate. Height 51/,—6, head 3'/,—4, strongly depressed, 
much broader than high, its width a little less than its length. 
Bones of upper surface of head, and triangular humeral process 
strongly granulated, granules partly arranged in radiating or 
concentric lines; they extend even on the foremost part of the 
lateral line. Occipital process forming a subcircular plate, broader 
than long, with a median keel, touching the strongly granulated, 
very broad butterfly-shaped basal bone of dorsal spine, the form 
-INDO-AUSTRALIAN FISHEs II. 19 
