CLASSIFICATION. 



*IT. FISHES. THREE GROUPS or DIVISIONS based upon the distinctive 



character of the fins, viz. 

 ACANTHOPTERYGII, (Spine-rayed fins.) 

 MALACOPTERYGII, (Soft-rayed fins.) 

 CHONDROPTERYGII, (Cartilage-fins. ) 



Agassiz bases the orders upon the scales and makes them four. 

 Ctenoids, (Comb-like.) 

 Cycloids, (Circle-like.) 

 Ganoids, (Splendor-like.) 

 Placoids, (Plate-like.) 



1st ORDER. 



ACANTHOPTERYGJI, 



(Spine-rayed,) 



or 

 CTENOIDS. 



Family Percidcs, (Perch.) 



Triglidce, (Gurnards.) 



Scienidce, (Maigres, Sheep s-heads, Drum-fish, &c.) 



Sparidce, (Sea-Breams.) 



Chcetontidee, (Chsetodons, Moon-fish, Razor-fish.) 



Scombridce, (Mackerel.) 



Anabassidce. (Climbing-Perches.) 

 . Cepolid* or &amp;gt; (Ribbon . fish&amp;gt;) 

 I Tamada;, ) v 



Teuthida, (Surgeon-fish.) 



Atherinidoe, (Silver-sides.) 



Mugilida, (Mullets.) 



Gobidce, (Gobias.) 



Lophidce, (Crested or Toad-fish.) 



Lubridce, (Wrasses or Rock-fish.) 



Silurida, (Cat-fish.) 

 Cyprinidce, (Carps.) 

 EsocidcE, (Pikes.) 

 Fistularidce, (Pipe-fish.) 

 Salmonidce, (Salmon.) 

 Clupeidce, (Herring.) 

 Gadida, (Codfish.) 



Echeneidce, (Sucking-fish.) 

 Cyclopteridce, (Lump-fish.) 

 j Apodes, without ) Murcenidce or ) ,p , v 

 | ventral fins. J AnguWda-, $^ GiS -J 



{Lophobranchia or ) 

 Lophobranchii, [ Syngnathida, (Sea-horse, &c.) 

 (Tufted-gills.) ) 



C Plectognathi, ) Gyrnnodontid^ , Balloon-fish.) 

 ! (Plaited iaws^i f B(lhst * da; &amp;gt; (File-fish.) 

 ( (1-laiteu jaws) J Ostracionid(K) (Trunk-fish.) 



See Page 660. 



