70 



BULLETIN OF THE BUREAU OF FISHERIES. 



Body moderatch- elongate, the back rather stront;ly arched, the profile rising in a regular curve from 

 tip of snout to origin of dorsal fm, 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; premaxillary 

 strongly protractile; exposed portion of maxillary broad, its greatest width half its length, its posterior edge 

 slightly concave; preopercle entire; interorbital broad; 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 base 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 ] .4 

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

 peritoneum dusky; second interheemal spine long and slendei': posterior end of air-bladder bifid, ending in 

 2 long slender horns which fit alongside of second interhsemal. 



Color in spirits, silvery white, the back and upper part ot 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 -Y. Icapas, from which it differs chiefly in ha\'ing the premaxillary groove scaled, the eye larger, 

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



Fig. 8.—Xysl.cema baconenRis Evermann & Sealo, 



new .species. Type. 



This species is represented in our collection by two specimens— one (no. .3416) from Bacon, and the other 

 (no. 3377; from Jolo. Type, no. 55912, U. S. National Mii.seuiii, a specimen 7 inches long, from Bacon, 

 Sorsogon, P. I. The other, a specimen 5.5 inches long is a cotype, no. 4.538, U. S. Bureau of Fisheries. 



86. Xystsema kapas (Bleekcr). Duldul. 



TV'e refer to this species one specimen (no. 3376) .i.35 in. long from Jolo, 9 specimens (no. 3417, 3418, 

 3637 to 3639, and 3822 to 3825, 3.2 to 6.5 in. long) from Bacon, and 2 small examples (no. 3890) from Bulau. 



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; body without longitudinal darker lines. 



