754 PROCEEDTNas OF THE NATIONAL MUSEUM. vol.xxiii. 



42. POMACENTRUS RATHBUNI Jordan and Snyder, new species. 

 (Plate XXXIV.) 



Thifs species is characterized by having the preorbital smooth; the 

 depth of the hody contained 2^ times in length; the number of scales 

 in the lateral series 27; the teeth subtruncate; the dorsal with 13 spines 

 and 11 rays; the anal with 2 spines, 11 rays; the tin rays hlamentous, 

 and the lins without bands or spots. 



Type No. 49706, U.S.N.M. Locality, near Yokohama. Japan; 

 doubtless from Misaki or Boshu. Collected by P. L. Jouy. 



Head 3i in length; depth 2i; depth of caudal peduncle 6|; eye 2| 

 in head; snout 4; interorbital space 3; maxillary 3; dorsal XIII, 11; 

 anal II, 11; scales in lateral line 27; between lateral line and insertion 

 of dorsal 3; between lateral line and insertion of anal 9. 



Eye large; somewhat oblong; interorbital space convex; its width 

 equal to vertical diameter of eye. Snout short; rounded. Jaws sul)- 

 equal; cleft of mouth oblique; maxillary extending posteriorly to edge 

 of orbit; its length equal to width of interorbital space. Teeth in a 

 single row; tirmly embedded; 42 in upper jaw', 34 in the lower; incisor- 

 like; broad anteriorly, the cutting edge scarcely rounded; narrower 

 and gradually becoming pointed posteriorly. Gill-rakers on first arch 

 21; long, slender, with minute bristles on the sides. Preorbital nar- 

 row, its edge not notched. Edge of suborbital serrated; not adnate to 

 cheek. Posterior edge of preopercle finely serrated; the lower edge 

 entire. Opercle with a rather largo flat spine, above which are two 

 closely opposed smaller ones. 



Scales ctenoid. Head with scales everywhere except on preorliital, 

 symphysis of lower jaw and branchiostegal region. Body completely 

 scaled. Dorsal and anal fins with a low sheath of scales along their 

 bases. Interradial meml:)ranes of dorsal, anal, caudal and pectoral 

 fins with thin, oblong scales. Lateral lin'e interrupted in the region 

 of the seventeenth vertical row of scales, begiuiung again on the third 

 row below, where it is represented by a single pit in each scale. 



Dorsal spines growing longer consecutively to the fourth; others of 

 about equal length; middle ravw of dorsal filamentous. First anal 

 spine about one-half as long as the second; the latter a little shorter 

 than the vnys; posterior rays filamentous. Caudal deeplv forked; the 

 longest upper and lower rays filamentous. Pectoral pointed, the 

 upper rays longest. First (outer) ray of ventral filamentous. 



No distinct color marks on alcoholic specimen. A mere suggestion 

 of a dark spot immediately above gill opening; a small light brown 

 spot at upper edge of base of pectoral; edges of unpaired fins narrowly 

 washed with brownish; a narrow, indistinct, light band along the 

 center of each lateral row of iiyales. 



