Further Observations on Mimicry among Plants. 167 



That it is a tasty titbit to them is also evident from the fact that 

 the Hottentots like to eat it themselves. 



It is consequently obvious that those specimens which are best 

 hidden on the bare veld, owing to their colour and shape, have the 

 best chance of escaping destruction, while others which are more 

 conspicuous on the ground will be more readily detected and 

 eaten. 



Quite a similar case is Crassula deltoidea, which forms small grey 

 and white bodies on the granite hills of Little Namaqualand, and 

 looks so similar to the fragments of granite among which it is at 

 home that detection is as difficult in this case as in the other one. 



As long as there was only the one instance known referred to by 

 Burchell and Wallace, one might have tried to explain it away as a 

 mere coincidence, but with ten such remarkable examples — and 

 I have no doubt that more will be found when proper attention is 

 paid to the matter — the theory of coincidences is hardly admissible. 



In my paper on "Mimicry among Plants," a species of Mesembryanthemum 

 was mentioned with white leaves {Trans. S. A. Phil. Soc, vol. xv., p. 101, line 4). 



