THE FISHES OP SAMOA. 355 



CTENOCH-ffiTUS Gill. 



Ctenodon Swainaon, Nat. Hist. Fish, n, 256, 1839 (strigosus) ; name preoccupied. 

 Ctenochxtus Gill, Proc. U. S. Nat. Mus., 1884, 277 (slrigosus). 

 This genus contains species with slender movable teeth, each dilated at the apex. 



1206. Ctenochaetus striatus (Quoy & Gaimard). Palagi; Ponepone; Aau. Hawaii; Samoa; Anei- 



teum; New Ireland; New Britain; New Guinea; Guam; Carolines; Tahiti; Kaiatea; Fate; 



Karotonga; Tubuai and Shortland I. (Seale). 

 Acanthurus striatus Quoy & Gaimard, Voy. Uranie, 373. 1824, Guam, larva. 

 Acanthurus strigosus Bennett, Zool. Journ., iv, 1828, 41, Sandwich Is. Cuvier <fc Valenciennes, Hist. Nat. Poi^s.. X, 



243, 1835. Gunther, Cat., in, 342, 1861, Sandwich Is. Gunther, Fische der Siidsee, iv, 116, taf. 79, figs. B and c, 1875, 



Sandwich Is. Seale, Bishop Museum, 1901, 109, Guam, Peters, Berl. Mon., 1876, 835, New Britain. 

 Acanthurus (Ctenodon) strigosus, Steindachner, Dcnks. Ak. Wiss. Wien, lxx, 1900, 494, Honolulu. 

 Acanthurus ctenodon Cuvier & Valenciennes, Hist. Nat. Poiss., x, 241, pi. 289, Caroline Is. Gunther, Cat., Ill, 342, 



Aneiteum, East Indies. Peters, 1. c., New Britain, New Ireland. 



This species is generally common throughout Oceania. We found it abundant both at Hawaii 

 and Samoa. The faint spots about the head and the faint streaks along the sides disappear in spirits. 



Life colors of a specimen from Apia, called palagi, blackish brown, unmarked; dorsal with very 

 faint horizontal streaks of bluish and bronze; anal very obscurely marked in the same way; caudal 

 deeply forked; no stripes on body. 



Another specimen was exactly like Hepatus atramentatas, but the profile of the head was much 

 more convex; many wavy blue and bronze stripes on a blackish ground. 



C0L0C0PTJS Gill. 



Colocopus Gill, Proc. U. S. Nat. Mus. 1884, 279 {lambdurus).' 

 This genus differed from Hepatus in having but two or three soft rays in the ventral fins. 



1207. Colocopus lambdurus Gill. New Britain; Kingsmill I.; New Guinea (Macleay); Mauritius. 



Acanthurus hepatus Gunther, Fische der Siidsee, 115, laf. 75; not Teuthis hepatus Linnaeus, which name properly 



belongs to the American species usually known as cwruleus. Peters, Berl. Mon. 1877, 835, New Britain. 

 Colocopus lambdurus Gill, Proc. TJ. S. Nat. Mus., 1884, 279 (after Gunther), Kingsmill I., Mauritius. 



ZEBRASOMA Swainson. 



Zebrasoma Swainson, Nat. Hist. Anim., n, 256, 1839 (velifer). 

 Scopas Kner, Novara Fische, 1865, 212 (scopas). 



This genus differs from Hepatus in the short spinous dorsal of 4 or 5 graduated spines; soft dorsal 

 high; snout short, projecting at an angle. 



1208. Zebrasoma flavescens (Bennett). Samasama. Hawaii; Marcus I.; Guam; New Guinea 



(Macleay). 

 Acanthurus flavescens Bennett, Zool. Journ., iv, 1828, 40, Hawaii. 

 Zebrasoma flavescens, Steindachner, Sitz. Ak. Wiss. Wien 1900, 493, Honolulu. Bryan & Herre, Bishop Museum, 



1903, 234, Marcus I. 

 Acanthurus virgatus Vaillant & Sauvage, Ann. Sci. Nat., 1875, 283, Honolulu. 

 Acanthurus agana Seale, Bishop Museum, 1901, 110, Guam. 



This species is rather common about the Hawaiian Islands, and is reported from Guam under the 

 name of Zebrasoma agana. Zebrasoma virgatum must be the young of this species, with blue spots on 

 the head and brown blue streaks and pale cross-shades on the body. The description differs from 

 Zebrasoma flavescens as the young of Zebrasoma rhombeum differs from the adult. 



This species apparently agrees with Zebrasoma rhombeum in all respects except color. Were it not 

 for its geographical separation we should follow Gunther in uniting rhombeum with flavescens. The 

 two are in fact probably the same species, the name flavescens being the older. 



1209. Zebrasoma rhombeum (Kittlitz). Iliv; Alt palagi. Samoa; Ulea; Fiji; Aneiteum; East 



Indies. 

 Acanthurus rhombews Kittlitz, Senckenberg Museum, I, 1834, 196, pi. xni, fig. 16. 

 Acanthurus scopas Cuvier & Valenciennes, Hist. Nat. Poiss., x, 245, pi. cexe, 1835, He de France, Ulea. Bleeker, 



Nat. Tijds. Ned. Ind., 1851, 348. Guichenot, Sagra Hist. Cuba, 122, 1851, Cuba by error. Gunther, Cat., in. 342 



1861, Ceram, Sandwich Is., Aneiteum. 

 Acanthurus altin lis Cuvier & Valenciennes, op. cit., x, 249, 1036, lie de France. 

 Acanthurus goramensis Cuvier & Valenciennes, op. eit., x, 1835, Goram, young. 



