CLASS PISCES. 173 



One or two ocellated spots are observed in some l . 



Some of these chastodons, properly so styled, are 

 distinguished from the others by a filament formed 

 by the prolongation of one, or several, of the soft rays 

 of the dorsal 2 . 



Finally, some are remarkable for the very small 

 number of the spines of their dorsal 3 . These species 

 are new, as well as many others of the preceding sub- 

 divisions, and will be described in our ichthyology. 



Chelmon, Cuv. 



Separated from chgetodon on account of the ex- 

 traordinary form of the snout, which is long and 

 slender, only open at the extremity, and formed by a 

 most excessive prolongation of the intermaxillary, and 

 the lower jaw. Their teeth are very fine and crowded, 

 rather resembling the pile of velvet than hairs. 



One species, Chcet. rostratiis, Lin., Bloch., 202, has 

 the faculty of spurting drops of water on the insects 

 it perceives on the shore, and thus bringing them 



frontalis, Cuv., or Pomacentre croissant, Lacep. Ch. fasciatus, 

 Forsk., or Ch.flavus, Bl., Schn., No. 37- 



1 Ch. nasogallicus, Cuv., Ren. I. v. 37 ; and Will., App. V. 4. 

 Ch. capistratus, L., Seb. III. xxv. 16. Mus. Ad. Fred, xxxiii. 4; 

 Klein. Misc. IV. xi. 5. Ch. bimaculatus, Bl. 219. 1. Ch. plebeius, 

 Gm. Ch. unimaculatus, Bl., 201. 1. Ch. sebanus, Cuv., Seb. III. 

 xxv. 11. Ch. ocellatus, Bl. 211. 2. 



2 Chcet. setifer, Bl. 426. 1. Ch. auriga, Forsk. Ch. principalis, 

 Cuv., Ren., part II. lvi. 239. Valent., No. 407. 



3 These species are new, as well as many others which belong to 

 preceding divisions. They will be described in our ichthyology. 



