246 



TEETH OF THE WOLF-FISH. 



are cracked and crushed by the teeth, their fracture and 

 displacement must obviously be no unfrequent occur- 



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rence; and most specimens of the jaws of the Avolf-fish 

 exhibit some of the teeth either separated at this line of 

 imperfect anchylosis, or, more rarely, detached by frac- 

 ture of the supporting osseous alveolar process. 



Thus, with reference to the main and fundamental tis- 

 sue of tooth, we find not fewer than six leading modifica- 

 tions in fishes. 



