Ill] 



THE CIRCULAR SNARE 



19 



bow. The spider seems carefully to avoid treading 

 on it as it proceeds, utilising the non-viscid spiral 

 scaffolding already described. 



A little attention to the centre of the wheel, and 

 the snare is complete. Some species of Epeira 



Fig. 3. Stretching the viscid spiral. 



entirely remove the centre, leaving a -circular" empty 

 space, while others fill it with an irregular network 

 of threads. 



How does the garden spider avoid getting caught 

 in its own web? We have shown that there are 

 many lines which are not viscid, and no doubt these 



22 



