96 SaUALIDES. 



thrasher. We apprehend, however, that there is 

 some mistake in these supposed battles. 



The thrasher may always be known from all 

 other varieties, by the upper lobe of the tail, which 

 is as long as the entire body. Generally, the 

 thrasher averages from nine to fourteen feet. They 

 are seen on our coast very often, in the summer, 

 running with great swiftness, — the tip of the long 

 tail fin cutting the water. 



GEN. ZYG.ENA. 



Hammer-Headed Shark, — Zyg&na Vulgaris. 

 Shovel-headed shark, is another name, by which this 

 remarkably constructed fish is known to American 



HAMMER-HEADED SHARK. 



seamen. But little time since, a sailor offered one, 

 recently caught, for sale, which he wheeled through 

 the streets of Boston, on a barrow, attracting 

 crowds of people, who gazed upon it in perfect 

 wonder. 



