xo. 2149. JAPANESE MACROUROJD FISHES— GILBEBT AND HUBBS. 209 



orbital wide, 2.5 in head, its sides parallel; least suborbital width 

 1.25 in orbit, its ridge bluntly angulated transversely^, horizontal 

 below posterior half of orbit, rising abruptly anteriorly toward 

 anterolateral rostral angle; margin of preopercle evenly curved, 

 almost completely adnate to subopercle and interopercle, which it 

 fails to cover at any point; preopercular ridge produced back- 

 ward as a semicircular arch, the chord of which is contained 1.25 

 in orbit. Mouth oblique, the maxillary extending to below middle 

 of eye, 3.75 in head. Teeth small, confined to anterior half of jaws; 

 the premaxillary band narrow, the outer series scarcely enlarged; 

 the mandibular band very narrow, not more than two or three 

 scales deep at any point; barbel short and slender, 0.15 of the orbit; 

 nostrils in a round naked fossa, about one-third as long as orbit; 

 scaleless groove parallel to anterolateral margin of snout very nar- 

 row, but distinct. Branchiostegals 7; gill-rakers tubercular; gill 

 slit before first arch, and that behind fourth arch, each about one- 

 third as long as orbit. 



Pyloric caeca very short, only half as long as orbit, 9 in number in 

 a paratj'pe. 



Scales small, 14 in a series from origin of second dorsal to lateral 

 line, 38 from anal origin to lateral line; scales in rather irregular 

 series on body, nonimbricate on the head. Those on the body bear 

 long, curved, and suberect spinules arranged in quincunx order, 5 to 

 12 on each scale on trunk, about 5 on each scale on head, similar to 

 those on body. Terminal tubercle of snout comparatively weak, 

 rounded, armed with conic spinules; lateral tubercles indistinct. 

 A series of enlarged scales along base of second dorsal, armed with 

 very strong spinules. Lateral line with the external groove obso- 

 lescent or concealed, opening through a series of widely spaced 

 black papillae extending along middle of tail, slightly rising ante- 

 riorly, but not forming an arch, a line of similar papillae extending 

 from origin of lateral line backward near dorsal base; scattered 

 papillae near anal base; one constantly present, located vertically 

 below origin of dorsal a distance contained 2.5 times in orbit; a 

 series of papillae extending forward from first dorsal on each side, 

 near dorsal contour. Median line of gular membrane scaled; 

 branchiostegal membrane naked ; imier edge of shoulder girdle com- 

 pletely naked. 



First dorsal spine small but sharp, without a longitudinal groove, 

 the anterior edge rounded ; second spine rather strong at base, fila- 

 mentous at tip, about half length of head, its anterior edge trenchant, 

 and armed with 21 small, procumbent serrations (stronger in some 

 of the paratypes) ; base of first dorsal 1.9 in interdorsal space, 1.3 

 in orbit; second dorsal low, the longest rays 3 in orbit Origin of 

 36399°— Proc.N.M.vol.51— It! 14 



