ACANTHUEUS. 
57 
180. Acanthurus ctenodon. [493, 585.] 
Acantliurus ctenodon, Cuv. Val. x. p. 241, pi. 289; Giinth. Fish. iii. p. 342. 
strigosus, Bleek. Nat. Tydschr. Ned. hid. iv. p. 264, and vi. p. 102. 
T) 8 A 3 
24-30* * 22-27* 
Var. a [585] agrees with the specimens in the British Museum, described by Dr. 
Gunther (l. c.), especially with those from Amboyna. 
Var. b [493] is of a dark-brown colour, covered with minute pearly spots, which dis- 
appear shortly after death. 
Zanzibar. Ceylon, 
line Islands. 
Fast-Indian archipelago. New Guinea. 
New Hebrides, Caro- 
181. 
Acanthurus rhombeus. 
[278.] 
Acanthurus flavescens, Benn. Zool. Journ. iv. 1828, p. 40. 
rliombeus, Kittl. in Mas. Senckenb. i. p. 196, t. 13. f. 6 ; Giinth. Fish. iii. p. 342. 
scopas, Cuv. Vat. x. p. 245, pi. 290. 
altivelis, Cuv. &; Val. x. p. 249. 
Colour uniform brown, with a greyish band descending obliquely from the supra- 
scapula to the middle of the side. 
Zanzibar. From Mauritius to Polynesia. Coast of Cuba. 
182. 
Acanthurus xantliurus. Plate VIII. fig. 4. 
[116.J 
Acanthurus xantlnu’us, Blytli in Kelaart’s Prodr. Faun. Ceylan. Append, p. 50; Giinth. Fish. iii. 
p. 343. 
A 3 
20 - 21 * 
Height of the body rather more than two-thirds of the total length without caudal ; 
snout rather produced ; about eight lobate incisors on each side of the upper jaw ; dorsal 
and anal fins rather elevated ; scales minute, rough. 
Colour wholly black, with a golden-yellow tail ; pectorals yellowish. 
Aden. Coast of Ceylon. 
183. Acanthurus velifer. [9.] 
Acanthurus velifer, Bloch, ix. p. 106, t. 427. f. 1 ; Giinth. Fish. iii. p. 344. 
blocliii, Benn. in Proc. Zool. Soc. 1835, p. 207. 
Zanzibar. Sea of Batoe. 
184. Acanthurus desjardinii. [182.] 
Acanthurus desjardinii, Benn. in Proc. Zool. Soc. 1835, p. 127 ; Giinth. Fish. iii. p. 344. 
Zanzibar. Mauritius. 
This may prove to be only the adult state of Acanthurus velifer , Bloch. 
i 
