668 BULLETIN 10 0, UNITED STATES NATIONAL MUSEUM 



delphia, vol. 87, p. 96, 1935 (Bangkok).— Hardenbebg, Treubia, vol. 15, livr. 

 3, p. 228, 1936 (middle course Kapuas R., Borneo). — Fowlee, Proc. Acad. 

 Nat. Sci. PhUadelphia, vol. 87, p. 96, 1935 (Bangkok) ; vol. 89, p. 132, 1937 

 Paknam). — Suvattt, Index Fish. Siam, p. 17, 1937 (Maenam Can). — Fowler, 

 List Fish. Malaya, p. 33, 1938 (reference). 



Depth 5; head 4%, width 3. Snout 4% in head; eye greater than 

 snout or interorbital ; maxillary not quite reaching hind preopercle 

 ridge or mandibular joint, expansion 1% in eye, length ll^ in head; 

 along each ramus of upper jaw 22 canine teeth, 11 along each ramus 

 of mandible; interorbital 7%, convex. Gill rakers 6-f 10, lanceolate, 

 11/^ in eye ; gill filaments equal gill rakers. 



Scales (pockets) 48 in median lateral series to caudal base and 4 

 more on latter; 12 transversely, 37 predorsal. Scales with 9 or 10 

 short marginal basal striae and 5 or 6 transversely apically; circuli 

 very fine, transverse, close set, not apical on scale. 



D. ni, 10, with small procumbent spine before fin origin, first 

 branched ray 2 in head; A ii, 42, inserted before dorsal origin, first 

 branched ray 2% ; caudal 1, well forked, lobes pointed ; least depth of 

 caudal peduncle 2% ; pectoral 1% ; ventral 3%. 



Back gray or drab brown. Sides and lower surfaces silvery gray, 

 evidently silvery white in life. Iris whitish. Fins all brownish. 

 Dorsal and caudal with grayish shades. 



Siam, East Indies, Cochin China, in brackish and fresh water. 



U.S.N.M. No. 47989. Cocbinchina. Lyons Museum. Length, 207 mm. 

 Genus XENENGRAULIS Jordan and Scale 



XenengrauUs Jordan and Seale, Copeia, No. 141, p. 29', 1925. (Type, Xenen- 

 grauUs spinidens Jordan and Seale, orthotypic.) 



Body compressed. Head rather small. Snout little protruded. 

 Mouth large. Maxillary reaches gill opening. Teeth in jaws large, 

 caninelike, smaller in mandible. Palate toothed. Gill rakers few. 

 Scales rather small, caducous. Enlarged scale at caudal base. Ver- 

 tebrae 48. Abdominal scutes 27. Dorsal fin with spine in front. 

 Anal long, inserted below hind part of dorsal. 



One species. 



XENENGRAULIS SPINIDENS Jordan and Seale 



XenengrauUs spinidens Jordan and Seale, Copeia, No. 141, p. 29, 1925 (type 

 locality: India, Siam, Calcutta, Rangoon) ; Bull. Miis. Comp. Zool., vol. 67, 

 p. 369, 1926 (same materials). 



Depth 3^5 ; head 5. Snout deep, not projecting beyond lower jaw, 

 1% in eye; eye 4% in head; maxillary reaches beyond gill opening 

 but not to pectoral base, length equals head; teeth 15 canines each 



