376 ROUND-FRONTED ACANTHURUS. 



and violent separation in different directions, torn 

 asunder in the conflict and destroyed. 



This fish appears to have been first described by 

 Grew in his Museum of the Royal Society, under 

 the name of the lesser unicorn fish ; he observes 

 that the head, when viewed in profile, bears some 

 resemblance to that of a baboon : the caudal spines 

 seem to have been wanting in this specimen ; 

 otherwise it is scarcely to be imagined that so ac- 

 curate an observer as Grew would have omitted to 

 particularize them. Willughby repeats Grew's de- 

 scription, and his figure is evidently engraved from 

 the same specimen. It is singular that so remark- 

 able a fish should have been entirely overlooked by 

 Linnaeus, even in the twelfth edition of the Systema 

 Naturae. In the British and Leverian museums it 

 occurs in fine preservation, and in the former are 

 specimens in a young state, shewing the com- 

 paratively inconspicuous appearance both of the 

 frontal process and caudal spines at that period of 

 its growth. 



ROUND-FRONTED ACANTHURUS. 



Acanthurus Nasus. A. griseus, nigro irroratus, gibbere frontali 



rotwidato, cauda utrinque biaculeata. 

 Grey Acanthurus, freckled with black, with a rounded frontal 



tubercle and two spines on each side the tail. 

 Le Nason Loupe. Cepede. 3. p. 111. 



In size this species equals, or even exceeds, the 

 preceding : the body is of a more oblong shape, 



