1 6 SHARP EYES 



once fully opened cones which had become closed again 

 from absorption of moisture from rain or snow, for any 

 one of these flaring open specimens will assume its orig- 

 inal form if immersed in water, opening again gradually 

 as the evaporation is more and more complete. The 

 opening of the cone begins at the base, each scale over- 

 lapping its fellows spirally in several tiers to the apex; 

 as the scale loosens it turns outward, and the pressure 

 of even one scale being suddenly released, a series of 

 clicks is likely to follow, as each one sets free its neigh- 

 bor. 





