ICE- ANCHORS. 



41 



Arctic expedition of 1875. Opposite is the skull of the Walrus, 

 the tusks of which are said to be used for exactly the same 



TUSKS OF WALRUS. 



ICE-ANCHOR AND ICE-HOOKS. 



purpose. Below are ice-hooks, also used for the same expedi- 

 tion. 



The next illustration exhibits a butcher's hook and a common 

 porter's hook, by which he lifts sacks on his back ; and oppo- 



^ !V^ 



SPONGE-SPICULES. 



<£= 



^> 



BUTCHER'S HOOK. 



PORTER'S HOOK. 



site them are some sponge- spicules, the similarity of which 

 in form is so remarkable that the former might have been 

 copied from the latter. 



Our next sketch shows a remarkable example of similitude 

 in form. There are certain small anchors called Kedges, which 

 are very useful for mooring a boat where no great power of 



r^u 



MUSHROOM KEDGE. 



resistance has to be overcome, and a large anchor would be 

 cumbersome. One of these is called, from its shape, the 

 "Mushroom Kedge," and is very useful, as, however it may be 



