158 BULLETIN 10 0, UNITED STATES NATIONAL MUSEUM 



1906 (1907), p. 18 (Cavite). — Jordan and Richardson, Bull. Bur. Fisher., 

 vol. 27, 1907 (1908), p. 255 (Aparri).— Beaufort, Bijd. Dierk., Amster- 

 dam, 1913, p. 113 (Mirdika River, Batu Merah River, Amboina; Kajeli, 

 Buru). 



Depth 2% to 2%) head 2% to 2%, width 2% to 2%. Snout 4% 

 to 5 in head from snout 'tip; eye 2% to 3}^, greater than snout or 

 interorbital; maxillary reaches slightly beyond front eye edge but 

 not to pupil, expansion 4 in eye, length 2*^ to 2% in head from snout 

 tip; teeth villiform, minute, in narrow bands in jaws, on vomer and 

 palatines and narrow bands on tongue medially; interorbital 3^5 to 

 4, slightly convex; single postero-supraorbital spine, none below; 

 preorbital edge with 6 spines, ridge with smaller serrae; lower ridge 

 and edge of preopercle denticulate, upper ridge and edge entire, spine 

 at angle of ridge little enlarged. Gill rakers 8 + 22, slender, lanceo- 

 late, much longer than gill filaments or 1% to 2 in eye. 



Scales 11 or 12 + 11+4 of which last on caudal base, lateral line 

 interrupted; 3 scales above lateral line, 8 below, 13 or 14 predorsal 

 nearly midway in interorbital form median keel, 2 rows on cheek and 

 preopercle flange naked; caudal with fine scales basally; basal scaly 

 sheaths, one scale wide along dorsals and anals. Scales with 6 or 7 

 basal radiating striae; circuli very fine. 



D. VII, I, 9, i, second erect spine 1^ to 1}4 m total head length, 

 first ray 2 to 2}/$; A. Ill, 9, i, third spine 1^5 to 2; caudal 13^ to l}4> 

 deeply forked, slender lobes sharply pointed; least depth of caudal 

 peduncle 2% to 2%; pectoral 1}4 to 1%; ventral V/i to 1%. 



Pale brown generally; scales on back and upper surfaces dusted 

 with dark brown dots marginally. Sides and lower surfaces with 

 bright silvery white reflections. Median diffuse silvery white band 

 from eye to caudal. Fins all pale or immaculate, except membrane 

 between second and third dorsal spines which dusted with dusky 

 behind second spine, but not black. Iris silvery white. 



East Indies, Philippines. Very closely related to Ambassis inter- 

 rupta, though distinguished by the pale second membrane of the 

 spinous dorsal. 



Six examples. Basut River, Canimo Pass, Luzon. June 15, 1909. Length 25 



to 51 mm. 

 Nineteen examples. Batangas River, Luzon. June 7, 1908. Length 20 to 



35 mm. 

 Two examples. Butauanan Island, east coast Luzon. June 12, 1909. Length 



35 to 38 mm. 

 Seven examples. Caiholo River, Palawan Island. December 29, 1908. Length 



28 to 32 mm. 

 Eleven examples. Capunuypugan, Generale Island, east coast Mindanao Island. 



May 9, 1908. Length 38 to 55 mm. 

 Twenty-two examples. Catbalogan, Samar. April 16, 190S. Length 15 to 



25 mm. 



