f 



1. ACAXTnrurs. 399 



Dr. V Blceker describes another sijecies, which is probably an in- 

 dividual variety of^. triostegus ■ the single specimen which occurred 

 was 29 millimetres long. 



Acanthurus pentazona, Bleek. Verhand. Batav. Genootsch xxiii 

 Teuth. p. 13, and Java, i. p. ] 07. ' '' 



D. A. A. i-. 

 20 ^'- 20 



^ The height of the body is one-half the total length (the caudal 



hn included). Caudal spine smaU. The upper profile of the snout 



IS convex ; caudal fin truncated. YeUowish, with five blackish 



transverse bands, the anterior of which passes through the eye 



Sea of Bata\da. 



B. With two tvkite cross-hands on the anterior part of the bochf. 



2. Acanthurus guttatus, 

 Harpunis guttatiis, Forst. Descr. Anim. ed. Licht. p 218 

 Acanthurus guttatus, Bl. Schn. p. 215 ; Cuv. ^- VaL x. p 195 

 Chffitodon stellatus, L. Gm. i. p. 1269. ^ 



D. -^. A -5- V l/,5 



27-28 ^- 24- ' • N'^- 



Scale^ very smaU smooth. The height of the body is two-thir-ds 

 of the total length (the caudal fin not included). The upper iaw 

 with SIX truncated and deeply lobate incisors on each side C-uidal 

 spine terminating posteriorly in a projecting process. The upper 

 profile of the snout is subvertical and veiy slightly concave. Caudal 

 fin subtruncated. Brownish, with two whitish cross-bands • one 

 from the nape of the neck over the operculum, the other from the 

 faith and SIX dorsal spines to the beUy. Posterior half of the body 

 dorsal and anal fins with numerous round white spots. 



Otaheiti. New Hebrides. Mauritius. 



a. Adult: bleached. Otaheiti. From Forster's Collection —Tvne 

 of the species. ' ^^ 



h. Adult : s^tiifi'ed._ Aneiteum. From Mr. MacgiUivray's CoUection ' 

 c Adult Mavuitius From the CoUection of the Zoological Society. 

 d. Adult: stuffed. Mauritius. ^ 



C. Coloration of the body yiearhj uniform, withoid conspicuous marUnqs. ' 

 Uround-colour brown ; sometimes a whitish ring round the base of the 

 caudal fin. 



3. Acanthurus chirurgus. 

 Acarauna, Marcf/r. p. 144. 

 Barbero, Parra, lam. 21. fig. 2. 

 Hepatus, Gronov. Zooj)hi/l'no. 353. 

 Chc-etodon nigricans, Bl. iii. p. 82. t. 203 ; (not L ) 



chinirgus, Bl. t. 208. 



Acanthurus'nigricaiis, pt.. Bl. Schn. p 211 



-- cliiriu-gus, £/. Schn.'^. '2U; Cuv. 8f Val. x. p. 168; Giuchen. in 



Mamon de la Sagra, Cuba, Pom. p. 120; Casteln. Anim. nouv. A?n^r. 



>yud, Poiss. p. 24. 



