218 BULLETIN 10 0, UNITED STATES NATIONAL MUSEUM 



Hepatus lineahis Jordan and Richardson, Bull. Bur. Fish., vol. 27, 1907 



(1908), p. 270 (Cagayancillo). 

 Acanthurus striatus Quoy and Gaimard, Voy. Uranie, Zool., 1824, p, 373, 



pi. 63, fig. 3. Mariannes Archipelago, Guam. 

 Acanthurus vittatus Bennett, Fishes of Ceylon, 1827, pi. 2. Ceylon. 

 Acanthurus harav (Montrouzier) Thiolliere, Fauna Woodlark, 1857, 



p. 179 (name in synonymy). 



Depth 1% to 2; head 3^ to 4, width \% to 2. Snout 1^ to 1^; 

 eye 3% to 5, 2% to 3% in snout, \}/i to \% in interorbital; teeth 

 12 to 16 in jaws, large; maxillary 3^^ to 3^ in head; interorbital 

 2% to 2%, convexly elevated; only humeral arch with few fine striae. 

 Gill rakers 5 + 11, short, flexible points. 



Fig. 12.— Variation of color markings of Hepatus lineatus (Linnaeus) 



Scales broad, large, very compact and narrowly imbricated, circuli 

 very minute; apical denticles 33 to 41, with 7 to 9 transverse series 

 of basal elements often more or less complete cusps. 



D. IX, 26, I or 27, i, last spine iVe to 2 in head, twenty-third ray 

 IK to 1%; A. Ill, 26, I or 27, i, thu-d spine 2% to 2J^, twenty- 

 third ray \% to 1^^; caudal deeply lunate or emarginate, points 

 prolonged, fin 2% to 2^ in combined head and body; least depth 

 of caudal peduncle 2 to 21^8 in head; pectoral 3% to 33^ in combined 

 head and body; ventral 33^ to ^%; caudal spine 2% to 2% in 

 head. 



Brown generally, with little tinge of gray or drab, little paler and 

 uniform below level of pectoral base. Above 9 or 10 pairs of 

 deep brown longitudinal parallel lines, within each pair very narrow 

 blue line and other paler interspaces wider than either of dusky or 

 dark lines. On front of head first 2 bands curve down and backward 

 so all those on cheek parallel. At caudal base bands abruptly end 



