OF THE UNITED STATES. . i'Z5 



ties, which no doubt have been previously observed 

 ami considered as one and the same, existing through- 

 out various seas. 



Essential Character. 

 In these fish the maxillary bone forms the whole 

 border of the upper jaw, which, as well as the infe- 

 rior, is extended into a long snout; they are both like- 

 wise armed with small teeth. The mouth has no other 

 teeth than those of the pharynx, which are as it were 

 paved. The body is elongated and covered with 

 scales, which are not very apparent, excepting a lon- 

 gitudinal carinated range on each side, near the lower 

 border. The back is remarkable for its colour, which 

 is of a fine green. The species of this genus differ 

 also somewhat from the Esoces in their intestines. 



B. -*argalus. 



Dorsal and anal fins unequal, their posterior ex- 

 tremities directly opposite, the anterior part of the 

 anal more advanced ; tail deeply forked, lobes ar- 

 rounded, the inferior longer; the lamina of the oper- 

 culum equal ; the head depressed. 



Body subquadrangular, attennuated to more than 

 three times the length of the beak, the tail laterally 

 carinated. Lower mandible a little longer than the 

 superior. Eyes very large, a little oblong, the pu- 

 pil somewhat depressed above. Lateral line very 

 low, interrupted by the ventral fins, and beginning 

 to rise above the base of the anal, are then continued 



