Correspondence. 



267 



Normal Group. 



Teeth on the pala- 

 tines. 



f 

 I 



t 



4. Toxotes, Cuv. 



Pempheris, Cuv. 



Dorsal long, opposite to the 

 anal, and reaching close 

 to the caudal. 

 Dorsal short, opposite to 

 the ventral, and far se- 

 parated from the caudal. 

 From Chaetodon we proceed to Amphiprion among the Sparidae, 

 which differ from the Chaetodontidae, by having no scales on the fins, and 

 from the Percidae, by having no teeth on the palatines. The following 

 may be the natural arrangement of Sparidae into genera : — 



Aberrant Group. f 1. Amphiprion, Bl. 

 SCOENOIDES.Czw. J 

 Operculum with J 2. 

 Preoper- 1 



spines. 



culum dentated. 



I 



Pristipoma, Cuv. 

 Sci.2ena, Linn. 



Typical Group. 

 No spines on the 

 Operculum and the 

 Preoperculum not 



One dorsal. Branchial rays 

 less than seven. 



One dorsal. Seven bran- 

 chial rays. 



Two dorsals distinct. Se- 

 ven branchial rays. 



Upper jaw extensile. 



t 



Upper jaw not extensile. 



Mjena, Cuv. 



Msenides, Cuv. 



Sparus, Linn. 



Sparoides, Cuv. 

 dentated. 



By means of Polynemus we pass from Sciaena to the Cirrhitidae, 

 which differ from the Percidae in having in general either more or less 

 than seven branchial rays, and from the Sparidae in having teeth ge- 

 nerally on the palatines. The Cirrhitidae, however, differ from each 

 other very much in form, as may be seen by the following genera which 

 are clearly of the rank of families : — 



Two dorsals. 



i 



1. Polynemus, Linn. 



2. Mullus, Linn. 



3. Trachinus, Linn. 



One dorsal, ven- 

 tral fins subpec- 

 toral. 



4. Beryx, Cuv. 



1 



Two dorsals distinct. Ven- 

 trals subabdominal. 



Two dorsals distinct. Ven- 

 trals subpectoral. Bran- 

 chial rays less than seven. 



Two dorsals united. Ven- 

 trals subjugular. Bran- 

 chial rays more than 

 seven. 



Branchial rays more than 

 seven. 



Branchial rays less than 

 seven. 



5. Cirrhites, 

 ^ Conem. 



By means of Trachinus we return among the Scorpaenidse, from 

 which we set out, so that the circle of PERCINA is completed. We now 

 therefore proceed to the next tribe, FISTULARINA, which we enter 



