ACANTHURUS. ACANTHURUS. 



Generic Character. 



Denies parvi, plerisque lo- 



batL 



Cauda utrinque aculeata. 

 Habitiis generis prseceden- 



tis. 



Teeth small, in most species 

 lobated. 



Tail aculeated on each side. 



Habit or general appear- 

 ance as in the preceding 

 genus. 



JL HE genus Acanthurus consists of such species 

 of the Linnoean genus Chcetodon as, in contradiction 

 to the principal character of that genus, have, in 

 general, moderately broad and strong teeth, rather 

 than slender and setaceous ones : they are also 

 furnished on each side the tail with a strong spine. 



UNICORN ACANTHURUS. 



Acanthurus Unicornis. A griseo'fuscus, cornu frontali an- 

 trorsum por recto, cauda utrinque biaculeata. 



Grey-brown Acanthurus, with a frontal horn stretching for- 

 wards over the snout, and two spines on each side the tail. 



Monoceros minor. Will. khth. p. 2 1 6. t. O. 4. 



Le Nason Licornet. Cepedc. 3. p. 103. 



THIS and the following are by far the largest of 

 the genus, grpwing to the length of three feet or 



