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 M'ONDERS 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 shin structures 

 —Human hair— Hair sections — Conclusion . Pp. 244-:^l:>4 



Index Pp. 265-272 



