150 AMERICAN FISHES. 



lowing the formation of the head, which is remarked in one or other 

 of these, as regards the comparative length of the snout, the formation 

 of the lower jaw, the dental system, and the gill-covers.' So marked 

 is this difference, that in addition to the wood-cuts of the entire fishes, 

 I have thought it well to give large representations of the heads of 

 these two noble fish ; and .by examining these with a little care, and 

 cqmparing them with the heads of any of the smaller varieties, it will 

 be easy to distinguish to which type any one of them belong. 



Thus, any person will at once perceive that the Common Pickerel, 

 in the comparative length of the jaws, and the beak-like form and 

 scanty dentition of the lower mandible, follows the type of the Masoa- 

 longe ; while the Long Island species resembles, in the short obtuse 

 snout, and extension of the teeth to the tip of the lower jaw, the North- 

 ern Pickerel. 



The same thing will be found to be the case with all the other sub- 

 species, although the differences between them are so trifling, and so 

 purely technical, while their general resemblance is so great, and their 

 habits so entirely similar, rendering it impossible to mistake them for 

 fish of any other family, that I have deemed it superfluous to multiply 

 examples, or to give specific descriptions of more than the first four 

 Species ; contenting myself with enumerating the others, and indica- 

 ting the localities in which they are to be found, which will be alto- 

 gether sufficient, in order to prevent confusion. 



Note to Revised Edition. — Another species of this voracious fish, Esox Phale- 

 ratus, is laid down in some books, but it does not seem that any of the three, Niger, 

 VittatuSj'oi Phaleratus, are very clearly made out as permanent and distinct va- 

 rieties. Their habits, haunts, and manner of feeding are all nearly identical ; and 

 until a more complete search of the western and southern waters has been made, it 

 is useless to attempt going into minutiis of this kind. It is a singular fact, as stated 

 by Richardson, that no Pike or Pickerel has ever been taken in waters west of tho 

 Rocky Mountains. 



