FISHES OF THE PHILIPPINE AND ADJACENT SEAS 231 



HEPATUS OLIVACEUS (Schneider) 



Acanthurus idgricans olivaceus Schneider, Syst. Ichth. Bloch, 1801, pp. 

 XXXVIII, 214. Tahiti (on Forster.) 



Acanthurus olivaceus GtJNTHER, Cat. Fish. Brit. Mus., vol. 3, 1861, p. 336 

 (type; Fiji). — Bleeker, Verslag. ea Mededeel. Akad. Wet. Amsterdam, 

 vol. 15, 1863, p. 21 (Hitu, Amboina). — Gunther, Journ. Mus. Godeflfroy, 

 vol. 4, 1875, p. 113 (East Indies, Society Islands, Faiunotu, Samoa, Pelew 

 Islands, Hawaiian Islands). — Sauvage, Hist. Nat. Madagascar, Poiss., 

 1891, p. 343 (on Acanthure a croissant Lienard, Suppl. rapp. Soc. hist, 

 nat. Maurice, 1836, p. 55). — Weber, Siboga Exp., vol. 57, Fische, 1913, 

 p. 318 (Banda). — Herre, Philippine Journ. Sci., vol. 34, No. 4, Dec. 

 1927, p. 413, pi 12, fig. 1 (Subic Bay, Ambil, Agutaya, Jolo). 



Hepatus olivaceus Jordan and Evermann, Bull. U. S. Fish Comm., vol. 23, 

 pt. 1, 1903 (1905), p. 385, fig. 166 (Honolulu). — Jordan and Richardson, 

 BuU. Bur. Fish., vol. 27, 1907 (1908), p. 270 (Cagayancillo).— Snyder, 

 Proc. U. S. Nat. Mus., vol. 42, 1912, p. 510 (Okinawa).— McCulloch, 

 Mem. Queensland Mus., vol. 7, pt. 4, 1922, p. 243 (Capricorn Group). 



Acanthurus eparai Lesson, Voy. Coquille, Zool., vol. 2, pt. 1, 1831, p. 147, pi. 

 27, fig. 1. Tahiti. 



Acanthurus hiimeralis Valenciennes, Hist. Nat. Poiss., vol. 10, 1835, p. 231. 

 Carolines, Tahiti. — Jenyns, Zool. Voy. Beagle, Fish., vol. 4, 1842, p. 76 

 (Tahiti).— Bleeker, Nat. Tijds. Nederland. Indie, vol. 3, 1850, p. (740) 

 762 (Macassar); vol. 15, 1858, p. 200 (Coram); Act. Soc. Sci. Ind. N6er- 

 land., vol. 1, No. 5, 1856, p. 6 (Amboina); vol. 5, No. 8, 1858-59, p. 2 

 (Manado, Celebes). 



Harpurus paroticus Lichtenstein, Descript. Animal., 1844, p. 183. Tahiti. 



Depth 2i^ to 2K; head 33/^ to 3^, width l>g to 2. Snout 1^ to 

 13/3; eye 4% to 4^, 33^ to Z% in snout, l}/2, to \% in interorbital; 

 teeth 18 to 20 in jaws, moderate; maxillary 3J^ to 4% in head; 

 interorbital 33^ to 33^, convexly elevated; opercle, preopercle flange 

 and humeral arch with distinct striae. Gill rakers 8+17, short 

 flexible points. 



Scales very small, ovoid, closely imbricated, with very minute cir- 

 culi; apical denticles 7 to 10, with 5 to 7 transverse series basally, 

 mostly as well developed cusps. 



D. IX, 22, I to 24, I, last spine 2 to 23^ in head, first ray 1% to 2; 

 A. Ill, 22, I or 23, i, third spine 2}4= to 3, first ray 2 to 2%; caudal 

 deeply emarginate or lunate, points long and slender, extended, 2}4 

 to 2}/z in combined head and body; least depth of caudal peduncle 

 2^ to 2J^ in head; pectoral 1 to Iyq', ventral 13^; caudal spine 2J^ 

 to 33^. 



Largely uniform dusky brown. Iris deep brown. From opercle 

 above orange band, at least wide as eye, horizontally back far as tip 

 of depressed pectoral, and bordered all around with blackish band. 

 Fins largely dusky, hind emargination of caudal with whitish border. 

 Pectoral with hind border pale brownish. 



Mauritius, East Indies, Riu Kiu, Queensland, Micronesia, Polynesia, 

 Hawaii. 



