INSECT TR a L OD VTES. 



131 



FIG. 44. — TURRET SPIDER'S NEST AND TOWER. 



extended ten inches .straight downward, with cotton, 

 whicli was gently pu.'^hed down with a stick. 



" Pray why do you do that ?" asked the Doctor. 



" I have three purposes : one is to prevent the broken 

 soil from foiling in upon the spider who is down there 

 at the bottom of the cave ; another is to mark the 



