CONTENTS xvii 



arrangements Slugs which eat worms Tongue or proboscis 

 of the common blow-fly Proboscis of hover-fly Tongues 

 of butterflies Sap-sweeping tongue of the largest British 

 beetle Pp. 234-243 



CHAPTER XI 

 SIMPLE WONDERS OF THE MICROSCOPE 



Dust rubbed from the wings of a moth Scales of moths and 

 butterflies Hairs of insects Skins and scales of fishes 

 Feathers of birds Varieties in birds' feathers, and why they 

 vary Hairs of mammals Hairs are modified skin structures 

 Human hair Hair sections Conclusion . Pp. 244-^64 



INDEX Pp. 265-272 



