70 



BULLETIN OF THE BUREAU OF FISHERIES. 



Body moderately elongate, the back rather strongly arched, the protile rising in a regular curve from 

 tip of snout to origin of dorsal fin, thence descending in a broader curve to caudal peduncle; ventral outline 

 less convex: head pointed, the lips thick, jaws subequal, or the lower slightly the shorter: premaxillar}' 

 strongly protractile: exposed portion of maxillary l)road, its greatest width half its length, its posterior edge 

 slightly concave: prcopercle entire; interorbital liroad; premaxillary groove narrow, completely scaled 

 except a small circular area posteriorly above anterior margin of orbit; caudal peduncle rather deep, its 

 greatest depth greater than diameter of eye, or 3 times its least width. Scales large, thin, and firm; origin 

 of dorsal fin over ba.se of pectoral, the second spine slender, curved, and lengthened, its length greater than 

 half that of head; dorsal rays short; second anal spine shorter and scarcely larger than the third, its length L4 

 in eye; dorsal and anal fins each with a high, scaly sheath; caudal fin thickly covered with fine scales: 

 peritoneum dusky: second interhsemal spine long and slender: posterior end of air-bladder bifid, ending in 

 2 long slender horns which fit alongside of second interhi*mal. 



Color in spirits, silvery white, the back and upper part of side .showing faint dark lines along the middle 

 of each row of scales parallel with the back; tip of spinous dorsal dark, fins otherwise unmarked. This species 

 is close to X. iapas, from which it difl'ers chiefly in having the pi'emaxillary groove scaled, the eye larger, 

 the interorbital space broader, and the second anal spine smaller. 



Fig. 8. — Xt/st^iiia haco/tfii.^i.s EviTiiiiinn tt S<^:llo. new specips. Type. 



This species is represented in our cullection l>y two specimens — one (no. .3410) from Bacon, and the other 

 (no. 3377) from Jolo. Type, no. 5.5912, U. S. National Museum, a specimen 7 inches long, from Bacon, 

 Sorsogon, P. L The other, a specimen .5..T inclies long is a cotype, no. 4.'53S, V. S. Bureau of Fisheries. 



86. Xystsema kapas (Bleeker). Diihlid. 



We refer to this species one specimen (no. 3370) .5.3.5 in. long from Jolo, 9 specimens (no. 3417, 3418, 

 3637 to .3639, and 3822 to 382.5, 3.2 to 6.5 in. long) from Bacon, and 2 small examples (no. ,3890) from Bulan. 



Head 3.2 in length; depth 2.7; eye 3.5 in head; snout 3.2; interorbital 2.9; scales 4-40-9; maxillary 

 groove naked, interorbital width greater than orbit; preopercle not denticulate; base of ventrals midway 

 between tip ol snout and origin of anal; longest dorsal spine about 2 in depth of body: second anal spine 

 somewhat stronger but shorter than the third, its length 3.3 in head or 4.25 in depth. 



Color in spirits, silvery, tip of spinous dorsal black; Imdy without longitudinal darker lines. 



