2034 Dulletin 4.7, United States National Museum. 



Body moderately elongate, compressed throughout; back elevated be- 

 hind nape; 2 rows of strong, curved spines along whole length of each 

 side (sjiines of the other series smaller) ; first dorsal fin beginning behind 

 nape; dorsals far apart; anal fin long. Vent fiir back from base of ven- 

 trals. Head narrow anteriorly, abruptly broader behind ; mouth terminal ; 

 median rostral plate none; nasals united in front of maxillary pedicles, 

 luterorbital space broad, the supraocular ridges very prominent, with 

 large, flat, triangular supraocular spine or shelf; no occipital sjiines. 

 Teeth on jaws and vomer, none on palatines. Gill membranes united, free 

 from isthmus. North Pacific. {Ttepxic,, a synonym of Ttepuif, perch.) 



2808. PERCIS JAPONICUS (Pallas). 



nead4i; Br. 6; D.VI,7; A. 8; P. 12; V. 3(1,2); C. 2-13-2. Body com- 

 pressed throughout, the shoulder girdles prominent; width of body at 

 base of pectorals a little more than greatest height and 5 in body length. 

 Immediately behind pectorals the width a little less than greatest height; 

 between dorsals and on peduncle it is nearly 2, and under second dorsal a 

 little more than 2 in the height at the same points. Abdomen moderately 

 swollen in front of vent. The back rises at an angle of ■IS'^ behind occi- 

 put, slopes downward under first dorsal, leaving a hump under its front 

 end, rises in front of second dorsal and slopes downward again under it ; 

 ventral (mtline nearly straight; vent between ^ and I distance from ven- 

 trals to anal. Breast and area between ventrals and vent almost com- 

 pletely occui)ied by nearly flat, radially striated plates, with slightly 

 raised centers and of variable size, with innumerable, excessively minute 

 plates scattered among them; vent surrounded by prickles. Plates of 

 ventrolateral series small, beginning as distinct rows of spinous plates 

 about opposite vent, with an imperfect row of smaller spinous plates be- 

 tween them and the vent on each side, and converging toward anal. They 

 pass along sides of anal, remain distinct to about the eighth pair of plates 

 behind anal, and unite in a single median plate with a double spine; from 

 this plate to caudal the rows are again distinct, the plates alternating 

 instead of standing opposite each other; the superior and inferior lateral 

 series begin as distinct rows of spinous plates about opposite middle of 

 first dorsal, diverge to about front of second dorsal, and converge toward 

 base of caudal; the plates elongated vertically, their spines, rising 

 abruptly from their centers, are strong, thick, blunt, curved; about 37 

 plates in inferior and 35 in superior longitudinal row; between them lies 



■ Diasnosis : Body moderately slender, compressed, its width between tlie dorsals nearly 

 2 in di'|itli at same placf ; 2 rows of strong and 2 of weak sjiiiies aloiii; v.ah sidr (if hody. 

 and a. mrdiaii lateral idw of s]iiiK'les8 plates. Head 4!. I'r('0]ieri'nl;ir sjiiiic \:\V'j_r. aubor- 

 bital siiiiie tuliciciilai'. Sii]u-;i(icnlar ridge expanded into a tnangiilai slull' ])i(ijcrting 

 laterally tar licymid eye and i-ndiiig blnntly; nooeci|iital spines. I'.ack elr\ato(l bcliind 

 nape. First dorsal sl'iort, beuinning at nape. Plates in dorsal series 43 to 45; between 

 dorsals (frcini last spine to tirst ray) 14 ])airs (9 pairs between end of membrane of first 

 dorsal and tiist lay of second dorsal. Nasal spines sharp, far apart, at tip of snont. No 

 median rostral plate. Gill membranes united, free from isthmus. Teeth in broad bauds 

 on .jaws and on vomer; none on palatines. \'ent between J and J distance from ventral 

 to anal. Color (in spirits) "old ivory," with brown patches on sides, 1 under first dorsal, 

 1 between dorsals, 1 under second dorsal, 2 or 3 on peduncle, B. 6; 1 D. 6; 2 D. 7; A. 8: 

 P. 12; V.3(I-2); C. 2-13-2. 



