FISHES OF THE PHILIPPINE AND ADJACENT SEAS 207 



6576, 6577. Port Maricaban. July 21, 1908. Length 248 to 262 mm. 

 5038 to 5046. Silino Island. August 10, 1909. Length 109 to 200 mm. 

 A677. Sitanki Reef. September 24, 1909. Length 200 mm. 

 11506,11508,11509,21739. Sulade Island. September 17, 1909. Length 65 to 



92 mm. 

 A1235. Gomomo Island. December 3, 1909. Length 205 mm. 

 21359, 21360. Limbe Strait, Celebes. November 11, 1909. Length 140 



to 153 mm. 

 A1050. Tidore Island, south of Ternate. November 24, 1909. Length 255 



mm. 



Genus HEPATUS Gronow 



Hepatus Gronow, Zoophylac, 1763, p. 113. Not binominal. Type Teulhis 



hepatus Linnaeus, tautotypic. 

 Teuthis Linnaeus, Syst, Nat., ed. 12, voL 1, 1766, p. 507. Type Teuthis 



hepatus Litsin aevs = C haetodon caeruleus Bloch, designated by Gill, Proc. 



U. S. Nat. Mus., 1884, p. 278. 

 Theutis Bonnaterre, Tabl. Ichth., 1788, p. lv (156). Type Teuthis hepatus 



Linnaeus. 

 Rhombotides Klein, Neuer Schauplatz, vol. 1, 1775, p. 922. Type Chaetodon 



caeruleus Bloch, designated by Jordan and Evermann, Genera of Fishes, 



pt. 1, 1917, p. 38 (inadmissible). 

 Theutys Gouan, Hist. Pise, 1770, p. 105. Atypic. Type Teuthis hepatus 



Linnaeus. 

 Acanthurus Forsk.\l, Descr. Animal., 1775, p. 59. Type Teuthis hepatus 



Linneaus, designated by Desmarest, Encycl. Hist. Nat. Rept. Poiss. 



Chenu, 1874, p. 240. 

 Harpurus Forster, Enchir. Hist. Nat., 1788, p. 84. Atypic. Type Chaetodon 



sohal FoRSKAL, designated by Fowler, Journ. Acad. Nat. Sci. Pliiladelpia, 



vol. 12, ser. 2, 1904, p. 544. 

 Aspisurus Lacep^de, Hist. Nat. Poiss., vol. 4, 1802, p. 556. Type Aspisurus 



sohar Lacepede, monotypic. 

 Ctenodon (not Wagltor 1830 or Ehrenberg 1838) Swainson, Nat. Hist. 



Ann., vol. 2, 1839, p. 255. Type Ctenodon ruppellii (not Acanthurus rup- 



pellii Bennett) Swainson = Chaetodon sohal Forskal, designated by 



Swain Proc. Acad. Nat. Sci. Philadelphia, 1882, p. 276. 

 Acronurus (Gronow) Gunther, Cat. Fish. Brit. Mus., vol. 3, 1861, p. 345. 



Type Acanthurus argenteus QuoY and Gaimard, designated by Jordan, 



Genera of Fishes, pt. 3, 1919, p. 307. 



Body oblong, ovate to moderately ovate, never greatly elevated. 

 Teeth fixed, strong, lobate, edges finely serrated. Dorsal spines 

 usually 9, variably 6 to 10. Soft dorsal and anal not elevated ante- 

 riorly. Caudal spine erectile from a groove, antrorse, very sharp and 

 lancet-like. Caudal variously emarginate to lunate. Ventral with 

 spine and 5 rays. 



Numerous species, with generally sombre colors though a few 

 most strikingly banded, spotted or otherwise contrasted with brilliant 

 tints. Most are abundant in coral reefs. With age the dangerous 

 caudal spine is developed, usually absent in the young. 



