332 ACRONUEID^. 



spines, and one-half the total length (the caudal fin not included). 

 The profile between the origin of the dorsal fin and the nostril is 

 convex, that of the snout rather concave. There are five broad 

 incisors on each side of the upper jaw, and six in the lower ; th.0 

 latter are truncated, and denticulated only at the cutting margin. 

 Dorsal and anal fins rounded posteriorly in adult, pointed in young 

 specimens. Caudal emarginate (forked in young specimens). Uni- 

 form blackish oi brown ; a black spot posteriorly in the axil of the 

 dorsal and anal fins. 



Sea of China. Feejee Islands. 



a. Six inches and a half long. China. 



6. Thirty-eight lines long. Feejee Islands. Voyage of the ' Herald.' 



7. Acanthurus nigros. 

 ? Acanthurus nigroris, Cuv. S,- Val. x. p. 208. 

 D -5- A -^ 



25-27" ■ 23-25* 



The height of the body is one-half or more than one-half of the 

 total length (the caudal fin not included). The profile between the 

 origin of the dorsal fin and the nostril is convex, that of the snout 

 very slightly concave. There are six incisors on each side of the 

 upper jaw, and seven in the lower ; all are serrated only at the cut- 

 ting margin. Uniform brown : vertical fins and lips black ; a black 

 spot posteriorly in the axil of the dorsal and anal fins. 



(? Sandwich Islands.) New Hebrides. 



a-c. Adult, half-grown, and young : stuffed. Aneiteum. From 

 Mr. Macgillivray's Collection. 



8. Acanthurus doreensis. 

 Cuv. 8f Val. X. p. 220. 



Profile of the snout concave. Brown : the posterior half of the 

 pectoral is yellowish ; caudal with a whitish edge. ( Val.) 

 Dorey Harbour (New Guinea). 



* Uniform yellow. 

 9. Acanthurus chrysosoma. 

 Bleeker, Boeroe, ii. p. (57. 



The height of the body is rather more than one-third of the total 

 length (the caudal fin included). The profile of the snout is shghtly 

 concave ; six lobate incisors on each side oi tho upper jaw. Uni- 

 form yellow ; vertical fins slightly edged with brown. {Bl.) 



Sea of Kajeli. 



