664 BULLETIN 100, UNITED STATES NATIONAL MUSEUM 



vol. 89, p. 131, fig. 2, 1937 (Bangkok; Paknam) ; List Fish. Malaya, p. 30, 

 1938 (reference). 



Opisthopterus macrognathus Bleekek, Nederland. Tijdschr. Dierk., vol. 3, p. 299, 

 1866 (on Pristigaster tartoor Bleeker 1852) ; Atlas Ichth. Ind. Neerland., 

 vol. 6, p. 124, pi. (10) 268, fig. 4, 1866-72 (Java, Sumatra, Singapore, 

 Borneo). — Fowlek, Journ. Acad. Nat, Sci. Philadelphia, ser. 2, vol. 12, p. 

 501, 1904 (Padang, Sumatra) ; Proc. Acad. Nat. Sci. Philadelphia, p. 210, 

 1911 (Padang examples). — Weber and Beaufort, Fishes Indo-Australian 

 Archipelago, vol. 2, p. 96, fig. 32 (maxillary), 1913 (Batavia; Tjilatjap).— 

 ViNciGUERRA, Ann. Mus. Civ. Stor. Nat. Genova, ser, 3, vol. 10, p. 617, 1926 

 (Santubong). — Fowleb and Bean, Proc. U. S. Nat. Mus., vol. 71, p. 1, 1927 

 (Benkoelen, Sumatra). — Suvatti, Index Fish. Siam, p. 11, 1937 (Gulf of 

 Siam; Maenam Canthaburi). 



Pristigaster macrognathus Gunthee, Cat. Fish. Brit. Mus., vol. 7, p. 461, 1868 

 (type: Sarawak), 



Depth 31/6 to 334 ; head 4 to 4%, width 23^ to 3, Snout 4 to 41/8 in 

 head from snout tip ; eye 2% to 3, greater than snout or interorbital ; 

 maxillary reaches 14 to % in eye, expansion II/2 to 2 in eye, length 

 21/^ to 2% in head from upper jaw without median notch; teeth very 

 minute, single row in jaws and along entire lower maxillary edge; 

 interorbital 2 to 21/2 in eye, convexly elevated ; opercle smooth. Gill 

 rakers 9 or 10+22 to 25, finely lanceolate, little longer than gill fila- 

 ments or 14/5 to 2 in eye. 



Scales 40 ? to 46 in median lateral series to caudal base and 3 or 4 

 more on latter; 16 ? transversely, 36 ? predorsal. Abdominal scutes 

 27 to 34, Scales very caducous, all fallen from trunk, rather small 

 and narrowly imbricated. 



D, III, 9 to 12 ? first branched ray 1% to 2 in total head ; A. iii, 50 

 to 63, I, first branched ray 1% to 2 in eye; least depth of caudal 

 peduncle 1 to 2% in total head; caudal 1% to 2, small, forked; pec- 

 toral 1 to li/s- 



Pale uniform brown. Dusky brown median streak down back. 

 Top of head and ends of jaws sprinkled with dusky dots. Iris and 

 side of head silvery white. Fins pale. Pectoral and caudal with few 

 dull dusky dots, 



India, China, East Indies. 



U.S.N.M. No. 72514. Pelaboen Ratoe, Wynkop's Bay, Java. Bryant and Palmer. 

 October 1909. Length, 140 mm. 



3 examples A.N.S.P. Calicut, India. James Horuell. Length, 69-74 mm. 



A.N.S.P. No. 52868. Hong Kong. Henry W. Fowler. Length, 208 mm. 



1 example A.N.S.P. Padang, Sumatra. A. C. Harrison and H. M. Miller. When 

 fresh in arrack gray-brown on back, sides and rest of body silvered grayish 

 white, latter more intense below. Iris silvery white. Fins all pale or whitish, 



OPISTHOPTERUS VALENCIENNESI Bleeker 



Opisthopterus valenciennesi Bleeker, Atlas Ichth. Ind. Neerland., vol. 6, p. 124, 

 1866-72 (type locality: East Indies). — Norman, Ann Mag. Nat. Hist., ser. 9, 

 vol. 11, p. 11, 1923 (Bleeker's example). — Fowler, List Fish. Malaya, p. 30, 

 1938 (reference). 



