338 BULLETIN OF THE BUREAU OF FISHERIES. 



ff. Lepidoch-etodon: Scales unequal, those of the middle part of the body above largest; teeth much larger than 

 in related species; rows of scales nearly horizontal; snout moderate; the profile projecting above eye. 



o. Side, of back with a large black ocellus, often produced downward in a wedge-shaped blotch; 

 ocular band broad, meeting its fellow on breast; a black band on margin of dorsal and 



anal across caudal peduncle; ventral pale; caudal plain unimaculatus 



oo. Side of body with a black cross-blotch from last dorsal spines to above anal spines; ocular 



band broad below; ventral black; caudal plain; teeth undescribeci trichrous 



ooo. Side of body from front of anal backward entirely blackish; a black bar from front of 



dorsal to ventral, which is black; ocular band broad '.Jcleini 



fff. Rabdophorus: Scales subequal, the series extending horizontally or slightly extending posteriorly; teeth 

 small; snout obtuse or moderately acute. 



p. Soft dorsal with its first ray produced and whip-like; snout acute. 

 q. Back with a large black saddle-shaped area covering most of the dorsal and edged with 

 white below; ocular band very narrow and faint; ventral pale; caudal plain., ephippium 

 qq. Body bright orange, with blue spots along the rows of scales; ocular band broad, dis- 

 tinct; base of dorsal and anal black; ventral pale; caudal plain semelon . 



pp. Soft dorsal without elongate or whip-like ray; snout obtuse or slightly acute, not convex 

 above. 

 r. Body with about six transverse cross-bands; ocular band narrow, faint, a black spot 

 above it; a reddish band on caudal peduncle; caudal with a black bar; ventral 



pale punctatofasciatus 



rr. Body without dark cross-bands. 

 s. Body with about 10 narrow dark cross-streaks, each a row of small spots; ocular band 

 narrow; a black bar across caudal peduncle; anal w r ith a narrow dark edge; ventral 



pale ■ miliaris 



$&. Body with many oblique dark cross-streaks, each a series of spots along the row of 

 scales, those above ascending, those below horizontal; no black on caudal peduncle; 

 anal with a broad black streak and a bright yellow one above it; ocular band nar- 

 rower than eye, sharply defined citrinellus 



sss. Body without series of streaks, either oblique or vertical. 

 t. Ocular band present; snout obtuse. 

 u. Ocular band preceded by a black bar. 

 v. Black bar before eye covering snout; a black bar behind ocular band; body 

 withdark streaks along rows of scales; a black area surrounded by golden on 



dorsal, anal and caudal; ventral pale; a black spot on breast trifasciatus 



w. Black bar before eye, not covering upper lip, which is pale; a black area above 

 eye; three black bands behind eye, the first one extending backward to last 

 ray of soft dorsal; body with 6 oblique orange stripes; caudal with two black 



stripes; anal with one; ventral pale omatissimus 



uu. Ocular band not preceded by a black bar. 



w. Side of body with a black spot or ocellus; ocular band moderate, edged with 

 blue; no black on fins. 

 x. Sides of body below with 2 or 3 blue streaks; lateral spot a rounded 



ocellus bennelti 



xx. Sides of body below with about 13 faint streaks; lateral spot large, 



oblong speculum 



tow. Side of tail with a black ocellus; pale streaks along rows of scales; no black 



on fins; ocular band pale-edged .- plebeius 



wivw. Side of body and tail without ocellus. 



y. Back blackish, With two whitish blotches; ocular band orange, with dark 



edges; fins pale, with dark lines quadrimaculatus 



yy. Body with diffuse dark spots; ocular band broad, diffuse; snout black; 



ventral black; no yellow corallicola 



tt. Ocular band none; body with about nine oblique stripes of clear blue; caudal 

 peduncle and posterior part of dorsal black; caudal with a broad black band; 

 ventral pale; snout rather acute .fremblyi 



1131. Chsetodon setifer Forskal. SVu; Tifitifi sama. Hawaii; Samoa; Johnston I.; Guam; Tub- 



uai; Rarotonga and Fate (Seale); East Indies. 



Chsetodon setifer Bloch, Ichth., tab. 426, fig. 1, 17S8, Coromandel. Cuvier & "Valenciennes, Hist. Nat. Poiss., vn, 77, 



Bolabola, lie de France. Gunther, Fische der Sudsee, 36, taf. 26, fig. b, Sandwich Is. Smith & Swain, Proc. 



U. S. Nat. Mus., V, 1882, 137, Johnston I. Seale, Bishop Museum, 1901, 98, Guam. 



^etragonopterus auriga Bleeker, Atlas, Chfet., 47, tab. xi, Sumatra, Java, and all islands of the East Indies; not 



Chsetodon auriga of Forskal. 

 Chsetodon auHga, Steindachner, Sitz. Ak, Wiss. YVien 1900, 4S8, Honolulu; not of Forskal. 



This fish is common throughout the South Seas. We have 45 specimens from Apia and Pago Pago, 

 where next to Chzetodon vagabundus it is the most abundant of the tifitifis. It is known at once by 

 the black ocellus on the dorsal, one of the rays of which is produced. The dorsal ocellus with other 



