from the Sandwich IslaJids. 41 



and in the middle of the sides, where it is white ; in this latter situation 

 the white assumes the form of an oblong blotch, varying in length, and 

 in some individuals becoming almost vittiform. The fins are pellucid 

 and uniformly yellowish, except the upper margin of the pectoral ones 

 which is black. Occasionally the dorsal and anal fins are made dusky, 

 especially at their base, by very minute blackish points which extend to 

 the adjoining parts of the body. The dorsal fin projects considerably 

 from the body, ascending and descending gradually. The caudal fin is 

 nearly even, inclining to rounded. The sheath of the caudal aculeus is 

 pure white. 



The teeth are strong, and are serrated on their cutting margin ; the 

 middle ones are somewhat acute. 



Length 3 inches, breadth nearly equalling the length. 



10. ACANTHURUS STRIGOSUS. 



^c. fusco-brunneus, lineis longitudinalibus numerosis alhis sub-coeru' 

 lesceMibus, pinnas dorsalem analemque versus dejlexis: pinnd caudali 

 furcatd. 



D. ^,. P. 14. V.i. A.^V C. 16. 



The ground colour is dull brown, with blotches upon the head of a 

 pale yellowish brown, and vdth the margins of the scales approaching to 

 black : it is varied by numerous pale, slightly blue, longitudinal, slender 

 lines, which are somewhat waved, the middle ones passing directly to the 

 base of the caudal fin, the superior ones being bent upwards, near their 

 termination, towards the base of the hinder part of the dorsal fin, and the 

 lower ones being bent downwards towards the anal fin. The dorsal and 

 anal fins are pale at their base, and become blackish towards the margin, 

 especially at the hinder part : the caudal and ventral fins are nearly black : 

 the pectoral are transparent, their upper margin alone being narrowly 

 bordered with black. 



The dorsal and anal fins project moderately from the body at their 

 commencement; behind they are very prominent, and slope suddenly 

 downwards : they are covered at their base by scales. The caudal fin is 

 forked. 



The teeth are very numerous, slender, and elongated: they are in- 



