248 BULLETIN 10 0, UNITED STATES NATIONAL MUSEUM 



Herke, Philippine Journ. Sci., vol. 34, No. 4, Dec. 1927, p. 414, pi. 2, 

 fig. 1 (Guam). 



Acanthurus achilles Elera, Cat. Fauna Filipin., vol. 1, 1895, p. 532 (Luzon, 

 Cavite, Santa Cruz). 



Teuthis achilles Fowler, Proc. Acad. Nat. Sci. Philadelphia, 1899, p. 494 

 (Thornton Island, Polynesia). 



Hepatus achilles Fowler, Bishop Mus. Bull., No. 22, 1925, p. 28 (Hono- 

 lulu). — Fowler and Ball, Bishop Mus. Bull., No. 26, 1925 (1926), p. 18 

 (French Frigate Shoals, Johnston and Wake Islands). 



A large ovoid red blotch on side of tail including caudal spine, 

 becomes yellow in preserved examples. Also narrow blue line along 

 dorsal and anal bases and another around chin from one angle of 

 mouth to the other. Caudal edged white, broadly so behind, black- 

 ish submarginally all around with median bright red crescent. 



China, Philippines, Polynesia, Hawaii. 



19235 U.S.N. M. Fanning Islands. Dr. T. H. Streets. Length 193 to 235 mm. 



Three examples. 

 51096 U.S.N. M. Hawaii. Bureau of Fisheries, 1904. Length 180 mm. [05371]. 

 52475 U.S.N. M. Apia, Samoa. Bureau of Fisheries. Length 165 mm. 

 55330 U.S.N. M. Honolulu reef. Albatross collection, 1906. Length 187 mm. 

 55484 U.S. N.M. Honolulu. Dr. O. P. Jenkins. Length 184 to 193 mm. [1344]. 



Two examples. 



HEPATUS GUTTATUS (Schneider^ 



Acanthurus guttatus Schneider, Syst. Ichth. Bloch, 1801, p. 215 (Tahiti). — 

 Valenciennes, Hist. Nat. Poiss., vol. 10, 1835, p. 195 (Mauritius and 

 Friendly Islands).— Gijnther, Cat. Fish. Brit. Mus., vol. 3, 1861, p. 329 

 (Tahiti, Aneiteum, Mauritius); Journ. Mus. GodeflFroy, vol. 4, 1875, p. 

 109, pi. 69, fig. A (Mauritius, New Hebrides, Society Islands, Samoa, 

 Kingsmills, Pelew Islands, Hawaii). 



Harpurus guttatus (Forster) Schneider, Syst. Ichth. Bloch, 1801, p. 215 

 (name in synonymy), 



Hepatus guttatus Fowler and Ball, Bishop Mus. Bull., No. 26, 1925 (1926), 

 p. 19 (Wake Island). 



Chaetodonton stellati Gmelin, Syst. Nat. Linn., vol. 1, pt. 3, 1789, p. 1269. 

 Friendly Islands. 



Chaetodon stellatus Valenciennes, Hist. Nat. Poiss., vol. 10, 1835, p. 140 

 (name in text). 



Depth \y2t0iyz; head 3 to 2,\i, width \% to 1%. Snout 1% to 

 13/^ in head; e.ye 2>% to 5>5, 3K to 43/8 in snout, 2 in interorbital; 

 teeth 14 or 13 in each jaw; maxillary 33/^ to 4 in head; interorbital 

 23^ to 3, broadly convex; opercle with fine vertical striae. Gill rakers 

 5 + 16, short, feeble, cuneate points. 



Scales very minute with obscure, crowded, and extremely small 

 circuli; apical denticles 10 to 21, with 7 to 15 series of transverse 

 basal elements. 



D. IX, 28, ninth spine 2yV in head, fifth ray \% to 2; A. Ill, 23 or 

 24, third spine 23^ to 2%, third ray 1^^ to 2; caudal sHghtly emar- 

 ginate behind, 33^^ to 33^ in combined head and body; least depth 



