Chap. XII.] FISUES. 5 



Lc'lifves, is })crmanent and best markol in tlic older males 

 which have previously ascended the rivers. In these old 

 males the jaws become developed into immense hook-like 



Fig. 27.— Iload of female salmon. 



])rojections, and the teeth <;row into regular fangs, often 

 niore than half an inch in length. With the European 

 salmon, according to Mr. Lloyd,' the temporary hook-like 

 structure serves to strengthen and protect the jaws, when 



* 'Scandinavian Adventures,' vol. i. 1854, pp. 101, 101. 



