2 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 98 



line marking anterior boundary of scales ronghly curved, convex 

 anteriorly, resulting in bare areas above and below, that near dorsal 

 profile tapering backward approximately to origin of second dorsal, 

 that at ventral profile to anal opening ; anterior scales cycloid, but 

 moderately smaller than posterior ones, the latter moderately spinu- 

 liferous, the spinules few in number, confined to the median area, in 

 a single row at margin ; caudal with a transverse row of 4 scales at 

 its base, the outer scale in the row, above and below, conspicuously 

 modified, ovoid, the spinules at the side markedly long, gradually de- 

 creasing in length toward a median longitudinal line, the 2 middle 

 scales in the row of nearly the same size as the outer ones but rounded 

 in form with the spinules not modified, approximately the same as in 

 adjacent scales on caudal peduncle ; no scales on antedorsal distance, 



Fig. 1. 



-Pycnonuna rooscvclti; from the holotype, U.S.N.M. no. 108139; 20 mm. 

 Drawn by Andrew Pizzini. 



head, base of pectoral, throat, or midline of belly. First dorsal with 

 7 flexible spines, the first spine longest, reaching base of first or second 

 dorsal ray, the others gradually decreasing in length. Second dorsal 

 with 10, anal with 9 rays; those of anal nearly reaching a vertical 

 through end of hypural, those of dorsal falling short of that vertical. 

 Pectoral with 16 rays, its tip reaching a vertical approximately 

 through origin of second dorsal. Ventrals completely separated, the 

 tips falling at some distance short of anus. Caudal rather sbort. Mu- 

 cous pores present on head. 



Body with a diffusely and irregularly cross-banded color pattern, 

 with 6 dark bands against an olive grayish background ; the bands 

 broad, somewhat oblique, diffuse, without sharp boundaries, some- 

 times more or less interrupted ; a better-marked, darker, vertical band 

 at base of caudal, partly on fin and partly on caudal peduncle ; a trans- 

 verse, diffusely dark area at anterior margin of opercle ; a dark band 



