38 AMERICAN FISHES. 



the pharyngeal bones. RAYS. Br. 16 ; P. 16 ; V. 9 ; A. 16 ; D 

 120. 



" ' This description applies to a female the male differs in the up- 

 per jaw being elongated into a proboscis, which projects beyond the 

 lower jaw when the mouth is closed ; it is formed of a moveable carti- 

 laginous mass articulated to the extremity of the nasal bones, and is 

 furnished with teeth as well as the rest of the jaw. The lower jaw is 

 narrower, and entirely received within the concavity of the upper one 

 when the mouth is shut.' " 



