NATURAL HISTORY. 447 



Order III. PLECTOGNATHL(G<Y. Ittexrof, plaited; yvuQos, the 



jaw.) 



Family I. Diodontidae. (Gr. A/? , double ; odovc, a tooth.) 

 ORTHAGORISCUS. (Gr. 'OpGayopiaicoc, a Sucking-pig.) 



Mola (Lat. a MUl-ntons), the Short Sun-fish. 



tide. Sailors in this case are fond of trying their skill with a 

 harpoon. When struck, it uses very powerful but exceedingly 

 awkward efforts to escape. The sailors, of course, eat it, as 

 they do almost anything. 



THE STURGEON. 



The remaining fishes belong to the Cartilaginous sub-class ; 

 that is, their skeletons are composed of cartilage, and not of true 

 bone. 



The first sub-order possess free gill-covers like those of all the 



