THE FISHES OF SAMOA. 337 



and golden; snout ami forehead gray, with orange marks about jaws; two oblong whitish clouds on 

 side just above level of eye, the one ending near end of i)eftoral, the other at base of soft dorsal; 

 dorsal orange, dusky behind on base of soft dorsal, edged with orange, black and white; caudal black, 

 edged above and below with orange-yellow; a golden yellow cross-band, a black, then a drab edge; anal 

 creamy orange, edged with black and white; ventral yellowish white; pectoral colorless, orange-yellow 

 at base. 



Small specimens have the tail yellc;)W, nut black as in the a.lult; a broad black band involving .soft 

 dorsal and anal and the space between. 



GONOCHa:TODON Bleeker. 



Bod}- very deep; dorsal and anal fins nearly vertical posteriorly. Sides with vertical streaks, 

 meeting at an angle along the axis, the angle pointing forward. 

 1130. Gonochsetodon triangulum Cuvier & Valenciennes. New Guinea (Macleay); East Indies. 



(Chietodun triangvlum, harimessa. iiud karnif. Cuvier & ViiU'iiciennes.) 



CHaiTODON (Artedi) Linnaeus. Tiptifi. 

 ANALYSIS OF POLYNESIAN SPECIES OF CH^TODON. 



a. Lisophora: Tlows of scales of anterior part of body running upward and backward, each marked by a dark line, those 

 of posterior part of body running downward and backward almost at right angles with thetirst; snout 

 acute. 

 b. Dorsal flu with the first soft ray prolonged into a whip; a black ocellus below it; ocular band broad; ventral pale; 

 two black lines across caudal. 



c. Dorsal fin with a black ocellus below the prolonged ray seli/er 



cc. Dorsal fin without black ocellus ' auriga 



bb. Dorsal fin without produced ray; no black ocellus; ocular band broad, white-edged; a broad black band across base 



of dorsal to middle of base of anal; two black bands on caudal; ventral pale vagdbundus 



aa. Scales not arranged as above indicated, or at least not marked by lines meeting at an angle. 



d. Scales large, arranged in rows which are very distinct, both upward and backward and downward and backwanl, 

 forming a checker-board appearance; scales on middle of body very large. 

 e. Ocular band very broad below; a black band on soft dorsal; a broad, black band on caudal; ventral pale; snout 



sharp raffiesi 



ee. Ocular band not broader than eye; a short black nuchal bar; dorsal and anal narrowly edged with dark; caudal 



with a dark line; ventral yellow xanVmrus 



dd. Scales not arranged as above indicated. 



/. Scales unequal, those on middle parts of body larger than the others, the series usually extending upward und 

 backward, at least posteriorly; teeth very small. 

 g. Ch.etodontops: Snout acute, concave in upper profile. 

 h. Ocular band mesially yellow, with dark edges. 

 i. Body with 7 oblique dark stripes running upward and backward; cautial with a black crossbar; ventral 



pale pelewensi^ 



hh. Ocular band black. 



j. Ocular band broad, as broad as eye. 



k. Body with two dark violaceous cross-bands coalescent above, with narrow vertical streaks between 



them; caudal peduncle with a jet-black spot; a black line across caudal; ventral pale idietensis 



kk. Body without black cross-bands. 

 I. Black area at base of soft dorsal broad, sending oblique streaks downward and forward across the 



body; no black area on shoulder; ventral pale UneokUiis 



U. Black area at base of soft dorsal narrow, the oblique cross-streaks along rows of scales orange; 

 shoulder region black, with a median triangular orange area on each side; ventral pale, .lunula 

 jj. Ocular band faint or narrow, not so broad as eye. 



m. Ocular band obscure; a black band from soft dorsal across to anal; caudal with a black bar; 



ventral dark fiavirostris 



mm. Ocular band distinct, narrower than eye. 

 II. Body with numerous V-shaped cross-bands, the angle toward the head; a broad yellow band 



across soft dorsal to anal; ventral dark merteu^i 



nn. Body with about si.\ dark, curved cross-bands, each scale posteriorly with a black spot; back 



with a dark shade; fins mostly yellow dixoni 



nnn. Back blackish; side with oblique dusky lines;' a black spot at base of anal spines; a black 

 spot on breast, and two on base of caudal peduncle; a pale blotch on side of back; ventral 



pale; entire contour of body yellow melannotus 



gg. Snout obtuse, the profile not concave; ocular band very broad, extending from the nape to the ventral, edged 

 on both sides with yellow; snout black; body dusky, dove-colored above, each scale with a yellowish 

 spot; anal and band across caudal peduncle black; tips of last rays of anal fiery red; two black lines 

 across caudal rctiadatus 



