762 BULLETIN 10 0, UNITED STATES NATIONAL MUSEUM 



Hexanematichthys sagor Oghby, Proc. Linn. Soc. New South Wales, vol. 23, p. 



35, 1898 (Burma). 

 Tachysurus sagor Suvatti, Index Fish. Siam, p. 63, 1937 (Canthaburi; Bandon ; 



Songkhia; Pakphun; Pattani; Maenam Wen). — Fowler, List Fish. Malaya, 



p. 50, 1938 (reference). 

 Bagrus sondaicus Valenciennes, Hist. Nat. Poiss., vol. 14, p. 444, 1839 (typ.. 



locality: Straits of Sunda). — Cantoe, Journ. Asiatic Soc. Bengal, vol. 18, p 



1237, 1849 (Sea of Pinang, Malayan Peninsula). 

 Hexanematichthys sundaicns Bleekee, Atlas Ichth. Ind. N^erland., vol. 2, p. 26, 



pi. (14) 62, 1862 (Java, Madura, Sumatra, Banka, Borneo). 

 Oaleichthys sundaicns Fowleb, Proc. Acad. Nat. Sci. Philadelphia, 1905, p. 462 



(Baram, Borneo). 

 Bagrus javensis Valenciennes, Hist. Nat. Poiss., vol. 14, p. 445, 1839 (type 



locality: Java). 

 Bagrus doroides Valenciennes, Hist. Nat. Poiss., vol. 14, p. 418, 1839 (type 



locality: Pondicherry). — Gijnther, Cat. Fishes British Mus., vol. 5, p. 142, 



1864 (copied). 

 Arius doroides Bleekeb, Verh. Batav. Genootsch. (Bengal), vol. 25, p. 56, 1853 



(reference). 



Depth 5 to 7; head 3I/2 to 41/5, width 1 to II/5. Snout 4 in head; 

 eye 51/^ to 7, IVs to 2 in snout, 3 to 31/2 in interorbital ; mouth width 

 2 in head ; maxillary barbels reach 14 to % in pectoral ; outer mental 

 barbel reaches pectoral base to i/^ in pectoral fin; teeth in villiform 

 and little arched bands in jaws; on palate 2 rounded linked patches 

 each side with outer patch little larger, very narrow free median 

 interspace; bones of upper surface of head coarsely granulated, 

 with more or less radiating lines, extend to dorsal and beginning of 

 lateral line; occipital extension broad semicircular plate, short and 

 triangular in young, wider than long, and median keel reaches 

 broad, expanded dorsal buckler. Gill rakers 9, short, 14 to % of eye. 



Lateral line distinct, simple, axial. Axillary pore present. 



D. I, 7, fin height equals head, strong spine with front edge well 

 granulated and serrae along hind edge rather weak; adipose fin 1% 

 to 2 in head; A. iii, 14 or ni, 15, fin height II/2 to 1%; caudal 3 to 

 3% in rest of fish, greatly forked; least depth of caudal peduncle 

 3 ; pectoral I, 10, length 31/2 to S% in fish without caudal ; ventral i, 

 6, fin 2% in head. 



Dark slate brown to blackish above, under surfaces whitish. 



India, Malaya, East Indies. 



A.N.S.P. 3 examples. Baram, British North Borneo. 1898. Dr. William H. 



Furness 3rd. Length, 149-305 mm. 

 A.N.S.P. 1 example. Kapuas River, Borneo. 1897. A. C. Harrison and H. M. 



Miller. 



TACHYSURUS SONA (Buchanan-Hamilton) 



Pinielodus sona Buchanan-Hamilton, Fishes of Ganges, pp. 172, 376, 1822 

 (type locality: Bengal estuaries). — GtJNTHER, Cat. Fishes British Mus., 

 vol. 5, p. 143, 1864 (note). 



