CLASS PISCES. 161 



Dascyllus, Cuv. 



The fishes of this genus only differ from those of 

 the preceding one in their teeth, which are very short 

 and crowded 1 . They all inhabit the Indian Ocean. 



Glyphisodon, Lacep. 



Operculum and preoperculum smooth ; a single range 

 of trenchant, and generally notched teeth. 



They are found in the Atlantic 2 , but the Indian 

 Ocean produces many more 3 . 



Some of them are distinguished from the others by 

 numerous spines in the anal 4 . 



Heliasus. 



The opercular pieces of the glyphisodon, and teeth 

 similar to those of the dascylli, that is, small and 

 crowded. There are some of them in both oceans 5 . 



1 Chcetodon ar nanus, L., Mus. Ad. Fred, xxxii. Bl. pi. cxcviii. 

 f. 2. ( 



2 The Jacaraqua, Marcgr., or Chcetod. saxatdis, L., Mus. Ad. 

 Fred, xxvii. 3., which is also the Chcet. marginatus, Bl. 207. ; and 

 his Ch. mauritii, 213. 1. ; and the Ch. sargo'ide, Lac. : but it is not 

 the Ch. saxat'dis, Bl. 206. 2. ; Ch. curassao, Bl. 212. 



3 Chcetod. bengalensis, BL 213. 2., or Labre macrogastere, Lacep. 

 TIL xix. 3. Gl. melanurus, Cuv., or Labre six-bandes, Lacep. III. 

 xix. 2. Chcet. sordidus, Forsk., or Calamoia pota, Bussell 85. 

 GL sparoides, Cuv., Lacep. IV. ii. 1. GL lachrymatus, Cuv., Q,uoy 

 and Gaym., Freycin. pi. lxii. f. 7. GL azureus, ib. pi. lxiv. f. 3. 

 GL uniocellatus, ib. f. 4. 



4 Chcetod. suratensis, Bl. 217. Chcetod. maculatus, Bl. 427. 



5 The species are new ; we describe them in our fifth volume. 



VOL. X. M 



