GENERAL OUTLINES OF ICHTHYOLOGY. 35 



Barbel. These teeth are situated on a bone of the throat, 

 named the left pharyngeal bone. 



The teeth are named according to the bone upon which 

 they are placed, as inter-maxillary teeth, maxillary, vomer- 

 ine, palatine, &c. ; and the engraving here introduced 

 exhibits a front view of the mouth in the common Trout, 

 which is chosen as displaying the most complete series of 

 teeth amongst the Salmon family. 



A, Teeth on vomer, or central bone in the roof of the mouth. 

 B B, Teeth on right and left palatine bones. 



c, Row of hooked teeth on each side of the tongue. 

 D D, Teeth on superior maxillary, or maxillary bones. 

 E E ; Teeth on lower jaw, or inferior maxillary bones. 



