GLAUCOUS CIOETODON. 35? 



have generally one or more round black spots to- 

 wards the middle: gill-covers without spine : mouth 

 small, and concealed as it were among several 

 membranaceous pleats into which the lips or edges 

 are disposed : eyes rather large : scales small : tail 

 even, or rounded : native region unknown. 



With single dorsal fin, and forked or lunated tail. 



GLAUCOUS CHJLTODON. 



Cfraetodon Glaucus. C. corpore rhombeo-ovalo, supra cceruko 



fasciis transversis nigris, sub t us argenteo. 

 Blue Ch.Tetodon, with rhombic-ovate body ; the upper parts 



crossed by black bands ; the sides and abdomen silvery. 

 Chaetodon glaucus. IAn. Gmel. Block, t. 210. 



A HIGHLY elegant species: body rhombic-oblong: 

 colour on the upper parts fine blue, on the lower 

 silvery white with a tinge of rose-colour : on each 

 side the upper part of the body are five or six 

 narrow black bands, descending only half way 

 down : dorsal and anal fin blue, very long, slightly 

 falcated, and reaching as far as the tips of the tail, 

 which is very widely forked : at the origin of the 

 dorsal fin are five pretty strong spines, but none 

 on the gill-covers : the scales are of moderate size. 

 This species is a native of the American seas, and 

 grows to a considerable size, often exceeding a foot 

 or eighteen inches in length, and is in considerable 

 steem as a food. 



