LIST OF PLATES 



bATE 



I. A climax tropical forest in Burma . 

 n. A limestone desert 



III. (a) A typical sketch of high arctic dry tundra . 

 (^) Drifting pack-ice (Spitsbergen Archipelago) 



IV. {a) A semi-permanent pond in Oxfordshire 

 (d) Zonation of habitats on the sea-shore . 



V. {a) Zonation of plant communities on the Lancashire sand 

 dunes ....... 



FACING PAGE 



(d) Zones of vegetation on the edge of a tarn . 



VI. (a) Animal community in the plankton of a tarn 



(d) Effect of " rabbit pressure" on the Malvern Hills 



VII. (a) A guillemot cliff in Spitsbergen . . . . 

 (d) Adelie penguin rookery on Macquarie Island 



VIII. A "cemetery" of walruses on Moffen Island 



14 



22 

 22 



30 

 30 



40 



40 



54 



54 



102 



102 



106 



XX 



