46 THE ANGLER-NATURALIST. 



Order m. SOFT-FINNED FISH having lower arms*. 

 Family 1. Cod — Gadid^. 

 Species. 



Burbot, or Eel-pout. (Lota vulgaris.') 



Orderly. SOFT-FINNED FISH lacking ventral fins t. 

 Family 1. Eels — MuBiBNiD-^. 

 Species. 

 Sharp-nosed Eel. {Anguilla acutirostris.') 

 Broad-nosed Eel. (Atiytdlla latirostris.) 

 Snig. {Angtdlla niediorostris.') 



2iid Series. CARTILAGINOUS FISH \. 



Order II. FISH WITH FIXED GILLS §. 



Fam. 1. Fisli with mouth formed into a sucker — Gyclostomata. 

 Species. 

 Lamprey, or Sea Lamprey. {Petromyzmi marinus.) 

 Lampem, or River Lamprey. {Petromyzonjluviatilis.) 

 Fringed-lipped Lampern. (Petrotnyzon Planeri.) 



To give a practical exaiople of this classification : — The 

 Common Perch is a species of the Genus Perca, of the 

 Family of the Percidce, of the Order Acanthoptei'ygii, be- 

 longing to the True or Bony Series of Fish ; or, in other 

 words, is the 1st species, of the 1st Genus, of the 1st Family, 

 of the 1st Order, of the 1st Series. 



Space does not here admit of an account of the various 

 structural differences, more or less important, upon which 

 the several genera and species are founded; but they will be 

 given in detail in the course of the volume, under the history 

 of each fish. A few suggestions, however, for enabling the 



* Malacoptm-ygii svi-brachiati (p. 37). ■)■ Malacopterygii apodes (p. 37). 

 X CJiondrojiterygii (p. 38). § Oiomh-opterygii hrancldisjixis (p. 38). 



