THE FISHES OF SAMOA. 357 



edged with gray; trien a broader black band edged with gray; then four brown bands, yellow between, 

 then the caudal peduncle black, the pale stripe before it narrow; tail yellow, grayish behind, thus 

 seven dark bands; dorsal and anal dusky deep yellow, the dorsal with some spots behind; ventral 

 golden. 



ACANTHURTJS Forskal. 



(Monoceros, Naso, and Naseus of authors.) 



1212. Acanthurus unicornis (Forskal). Ili'ilia segi; Ume; Umelei. Hawaii; Samoa; Aneiteum; 



Guam; Tahiti; Waigiu; New Guinea; Raiatea (Seale); East Indies; Japan. 



This species, widely diffused through the tropical Pacific and varying excessively at various stages 

 of growth, is common about Hawaii. At Samoa we found it rather scarce, but four specimens being 

 obtained. The caudal spines are bluish on a pale ground, while those of Acanthurus lituratus are orange. 



Life colors of a specimen from Apia, dark olive, brownish below, paler on tail; spines clear blue; 

 dorsal light brown, with light bluish spots and a dark edge; caudal dusky, paler behind; anal clear 

 orange-brown, with a row of pale blue spots at base, then two pale bluish stripes and a whitish edge; 

 pectoral and ventral mottled orange-gray. 



Another specimen from Apia was grayish black, the spines dark blue; caudal peduncle brown, 

 paler; dorsal light orange, with oblique bluish streaks; caudal gray; anal light orange, with horizontal 

 bluish streaks; head, pectoral and ventral gray. 



1213. Acanthurus brevirostris (Cuvier & Valenciennes). Hawaii; Tahiti; Kingsmill I., New 



Guinea; He de France. 



Naseus brevirostris Cuvier & Valenciennes, Hist. Nat. Poiss., x, 277, pi. 291, 1835, East Indies. He de France, New 

 Guinea. Gunther, Cat., Ill, 349, 1861. Gunther, Fische der Sudsee, 121, taf. 79, fig. a, 1875, Kingsmill I., Tahiti. 



Acanthurus brevirostris Jenkins, Bull. U. S. Fish Comrn., XXII, 1902 (1903), 481, Honolulu. Snyder, Bull. U. S. Fish 

 Comm., xxii, 1902 (1904), 534, Honolulu. 



This species, rather common about Hawaii, was not found in Samoa. 



1214. Acanthurus incipiens Jenkins. Hawaii; Samoa. 



Acanthurus incipiens Jenkins, Bull. U. S. Fish Comm., XXII, 1902 (1903), 480, Honolulu. 



Two specimens were seen at Samoa, similar in form to Jenkins's type. One of these is plain 

 blackish, the other covered with blue spots. The caudal fin in both is blackish. This fin is largely 

 yellow in Acanthurus brevirostris, otherwise we might regard Acanthurus incipiens as the young of that 

 species. It is apparently an immature form. 



Life colors of one specimen from Apia, black, with a brownish shade; upper parts with small 

 rounded spots of deep violet-blue; belly paler, slaty; lips blue; a blue streak below eye; dorsal dark 

 brown, slightly bluish on spines, dusky on edge; ventral dark brown, paler behind, the edge blackish; 

 anal dark brown with two dark blue streaks and a dusky edge; ventral and pectoral dark brown; 

 caudal black with a faint trace of a pale edge. No trace of horn or of spines on tail. Length, 6' inches. 



1215. Acanthurus annulatus (Quoy & Gaimard). Tonga; Palau; Aneiteum; Fiji; Guam. 



Priodon annulatus Quoy & Gaimard, Voy. Uranie, 377, 1824, Polynesia, young. Seale, Bishop Museum, 1901, 113, 



Guam. 

 Naseus marginatus Cuvier & Valenciennes, Hist. Nat. Poiss., x, 280, 1835, Tonga; not Acanthurus marginatum Kittlitz. 



Gunther, Fische der Sudsee, 122, Palau, Aneiteum. 

 Monoceros marginatus Seale, Bishop Museum 1901, 114, Guam. 

 Priodon annutams Cuvier & Valenciennes, Hist. Nat. Poiss., x, 302, pi. 294, 1835, Guam, young. 



1216. Acanthurus tuberosus Laeepede. Guam; Aneiteum; New Guinea; Mauritii: 

 iVaso tuberosus Lac<5pede, Hist. Nat. Poiss., in, 111, 1802, He de France. 



Naseus tuberosus, Gunther, Fische der Sudsee, 123, Aneiteum, Ceylon, Zanzibar, Mauritius. 



Acanthurus nasus Shaw, Gen. Zool., v, 376, pi. 51, 1803, He de France. 



Naseus carolinaruma Quoy & Gaimard, Voy. Uranie, 3/5, pi. 63, fig. 1, 1824, Guam. 



Naseus tuber Cuvier & Valenciennes, Hist. Nat. Poiss., x, 290, 1835, He de France. 



Naseus tonganus Quoy & Gaimard, in Cuvier & Valenciennes, Hist. Nat. Poiss., x, 292, 1835, Tonga; specimen 



immaculate. 

 Naseus punctutatus Steindachner, 1874. 



This species we have not seen. It is probably rare in Polynesia. 



a This species, marked by green blotches, is imperfectly described, and has not been recognized by recent authors. It 

 is perhaps nearest Acanthurus tuberosus. 



