356 BULLETIN OF THE BUREAU OF FISHERIES. 



This species ranges widely through the East Indies. We have 50 specimens from Apia and 

 Pago Pago. The yellow form, called flavescens, we did not find in Samoa. The two forms, flavescens 

 and rhombeum, are without much doubt color variations of one dichromatic species. 



Life colors were noted in various specimens as follows: 



(1) Specimen from Apia, called iliu. Dark olive, somewhat clouded (a curved light blue streak 

 behind the eye, parallel with the golden iris, in young only) ; everywhere fine oblong light blue spots, 

 smaller and sharply defined on side of head, not evident on snout nor along the back; larger below 

 and behind; fins all plain olive-black, the, pectoral lighter olive; caudal spine bluish white; a short 

 oblique streak of light olive above pectoral. 



(2) An older example with light blue wavy streaks on .body, not spots; streak above pectoral 

 light yellow and very conspicuous; no blue behind eye; pectoral scarcely olive. 



(3) From Apia. Dark brown, grayish behind, with about 20 fine bluish white cross-streaks; a 

 whitish lateral streak above pectoral ; fins all dusky. Larger ones more sharply colored. 



(4) From Pago Pago. Posterior half of body fuliginous, darkest behind and merging anteriorly 

 into yellow-green with fine pale blue specks; olive-green above eyes; iris yellow. 



(5) From Apia. Blackish; faint bluish horizontal lines over body as in Hepatus lineolatus; a 

 yellowish white short band above pectoral; head unspotted; fins dark. 



(6) Specimen from Pago Pago, called iliu. Blackish brown; head, breast, and shoulders every- 

 where covered with fine bluish white dots; body with horizontal wavy stripes of the same color, on a 

 bronze-brown ground; fins dusky olive, unstriped; dorsal, anal, and caudal with a fine paler edge; 

 pectoral dark orange, dusky above and below; a long whitish stripe above pectoral. 



(7) One specimen was almost black, the spots very distinct, the stripes mostly obsolete; the 

 yellowish white line reduced to a round bright yellow spot near gill-opening, wanting on the other 

 side; iris pink red, not gray as usual. 



1210. Zebrasoma rostratum (Giinther). AH. Tahiti; Samoa. 

 Acanthurus rostratus Giinther, Fische der Siidsee, 117, taf. 66, fig. b, Tahiti. 



This species is close to Zebrasoma rhombeum, but the snout is longer, the fins rather higher, and 

 the color almost black. AVe have two examples from Apia, a little smaller than Gtinther's type, and 

 with the body deeper. 



Life colors of a specimen called iliu, black, with brownish tinge; snout reticulate; a vertical bar 

 behind pectoral golden olive, with blue cross streaks; a similar bar from beginning of dorsal across 

 opercle and obliquely across breast; five blue stripes and four olive between; below pectoral obscurely 

 reticulate, with bluish around dull olive spots; fins uncolored; caudal with narrow pale edge; caudal 

 spine black, as are all fins. 



1211. Zebrasoma veliferum (Bloch). Lupo. Hawaii; Samoa; Fiji; East Indies. 

 Acanthurus velifer Bloch, ix, 106, taf. 427, fig. 1, 1788. 



Acanthurus blochii Bennett, Proc. Zool. Soc. 1835, 207. 



Acanthurus hypselopterus Bleeker, Nat. Tijds. Ned. Ind., VI, 1854, 313, Flores. Giinther, Fische der Siidsee, 1875, 117, 



Fiji Is. Steindaehner, Denks. Ak. Wiss. Wien, lxx, 1900, 494, pi. iv, fig. 1, Honolulu. 

 Zebrasoma hypselopterum Jenkins, Bull. U. S. Fish Comm., XXII, 1902 (1903), 479, Honolulu. Snyder, Bull. U. S. 



Fish Comm., xxn, 1902 (1904), 533, Honolulu. 



This species is rather common about Samoa, whence we secured four examples. It is even more 

 frequent about Honolulu. Our largest example, about a foot long, corresponds very closely to Bloch's 

 figure of velifer. The caudal is dark, and the body is crossed by many dark cross-streaks, which cross six 

 or seven obscure dark cross-shades, the most distinct being the ocular and scapular bands. In younger 

 examples the cross-streaks are fainter, and in still younger they are wanting. The face is spotted with 

 pale and the six or seven dark cross-bands become more distinct. This form from 4 to 8 inches long 

 represents hypselopterum. Still younger forms have the snout and caudal yellow. We have none 

 which correspond exactly either to desjardinii or to ruppellii. 



Life colors of a specimen from Pago Pago, violet-black with four distinct yellowish cross-bands 

 (grayish in formalin); these and rest of body crossed by regular dark bronze streaks; broad black 

 ocular band reaching base of ventrals; head before it with network of bluish white spots; another dark 

 area from base of dorsal to front of anal; fins blackish; caudal with narrow pale edge; breast unspotted. 



A specimen from Apia, called lupo, had the snout and forehead dark yellow; ocular streak black 



