Contents:
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   Foreword  
1  Lithops: Their Structure and Growth Cycle
   by Professor Chester B. Dugdale ................... 15 
2  Lithops in Habitat by Professor Desmond T. Cole ... 21 
3  An Analytical Key by Dr. H.W. de Boer ............. 33 
   Bibliography ...................................... 47 
   List of Plates .................................... 49 
   Index of Species .................................. 53 
   Plates ............................................ 59