768 BULLETIN 10 0, UNITED STATES NATIONAL MUSEUM 



Cagayan River. Only known from fresh water. Said to reach 

 over 450 mm. and a male found with its mouth filled with large in- 

 cubating eggs, 12 to 15 in number. 



TACHYSURUS CROSSOCHEILUS (Bleeker) 



Arius crossocheilus Bleeker, Natuur. Geneesk. Arch. Nederl. Indie, vol. 3, pt, 2, 

 p. 137, 1846 (type locality: Batavia). — Weber and Beaxtfort, Fishes Indo- 

 Anstralian Archipelago, vol. 2, p. 276, fig. 107 (upper teeth), 1913 (Bay of 

 Boui, Celebes ) .^Heeke, Philippine Journ. ScL, vol. 31, p. 398, pi. 1, fig. 2, 

 1926 (compiled).- — Rosas and Martin, Dept. Agr. Comm. Manila Tech. 

 Bull. 6, p. 44, 1937 (reference). 



Arius tonggol Bleeker, Nat. Geneesk. Arch. Nederl. Indie, vol. 3, pt. 2, p. 292, 

 1846 (type locality: Batavia ) .—GtJNTHER, Cat. Fish. Brit. Mus., vol. 5, p. 

 164, text fig. (teeth), 1864 (type).— Meyee, Anal Soc. Espaii. Hist. Nat., 

 Madrid, vol. 14, p. 41, 1885 (Laguna de Bay). — Elera, Cat. Fauna Filip., 

 vol. 1, p. 570, 1895 (Luzon, Laguna de Bay). 



Ariodes tonggol Bleeker, Nat. Tijds. Nederland. Indie, vol. 20, pp. 238, 450, 1859-60 

 (Singapore) ; Atlas Ichth. Ind. Neerland., vol. 2, p. 39, pi. (9) 57, 1862 

 (Java, Sumatra, Bintang, Banka). 



Tachysurus tonggol Fowler, List Fish. Malaya, p. 51, 1938 (reference). 



Depth 41/2 to 4% ; bead 31/5' to 314, width 1% to 1%. Snout 21/5 

 to 2y2 in head; eye 5i/^ to 6V5, 2 to 3 in snout, 2% to 4 in inter- 

 orbital; mouth width 3 to 3% in head; maxillary barbel reaches 

 pectoral origin, % in depressed pectoral in young, outer mental 

 reaches % tO' pectoral origin or to latter in young, inner mental half 

 way or % to pectoral origin in young; moderate arcuate band of 

 villiform teeth in each jaw; on palate globular teeth in 4 separated 

 patches, as 2 well separated small patches anteriorly and 2 large 

 ovoid patches posteriorly close set and long axis converging behind ; 

 interorbital 1% to 2, broadly convex; cranium with some rather 

 feeble granulations and striae; fontanel long, rather narrow, not 

 quite reaching occipital plate; occipital plate little longer than basal 

 width, narrow hind end in contact with basal buckler. Gill rakers 

 4+18, lanceolate; 2% in gill filaments which I14 hi eye. 



Skin smooth. Humeral plate smooth, striae feeble. 



D. I, 7, first branched ray V/i to 1% in head; adipose fin length 

 3 to 31/^; A. V, 11, I, first branched ray 2% to 2%; caudal li/io to 

 1^85 deeply forked, lobes pointed and upper slightly longer; least 

 depth of caudal peduncle 3% to 4% ; pectoral ly^ to li/^, front and 

 hind edges of spine antrorsely serrate; ventral 1% to 2. 



Brown above, with silvery white on sides and below, showing 

 pale lilac and lavender reflections on sides. Under side of head 

 and abdomen sometimes more or less soiled with brownish, as on 

 upper surface. Iris pale yellowish or brassy. Barbels brownish. 

 Fins all with more or less dusky terminally or on paired ones 

 medially. 



Singapore, East Indies, Philippines. 



