46 THE ANGLER-NATURALIST. 



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

 Family 1. Cod 



Burbot, or Eel-pout. (Lota vulgaris.} 



OrderlV. SOFT-FINNED FISH lacking ventral fins f. 

 Family 1. Eels MURJENIDJE. 

 Species. 



Sharp-nosed Eel. (Anguilla acutirostris.} 

 Broad-nosed Eel. (Anguilla latirostris.} 

 Snig. (Anguilla mediorostris.} 



2nd Series. CARTILAGINOUS FISH \. 



Order II. FISH WITH FIXED GILLS . 



Fam. 1. Fish with mouth formed into a sucker CYCLOSTOMATA. 

 Species. 



Lamprey, or Sea Lamprey. (Petromyzon marinus.) 

 Lampern, or River Lamprey. (Petromyzon flumatilis.} 

 Fringed-lipped Lampern. (Petromyzon Planeri.} 



To give a practical example of this classification : The 

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

 Family of the Percida, of the Order Acanthopterygii, be- 

 longing to the True or Bony Series of Eish ; 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 



* Malacopterygii sub-lrachiati (p. 37). f Malacoptcryyii apodcs (p. 87). 

 I Chondropterygii (p. 38). Cliondropteryyii branchiisjixis (p. 38). 



