Notes on Some South African Tadpoles 



65 



Tadpole of Heleophryne natalensis H. W. H., and enlarged view 

 of sucker, (m, the mouth aperture; t, rows of minute horny- 

 teeth; b, beak formed by fusion of horny teeth.) 



in the mountain streams of Borneo and of the Himalayas, but 

 they are not directly related to ours, and moreover the suckers 

 are built on a different plan. It is quite evident that the 

 adaptation has been independently evolved in these several in- 

 stances. 



The above scanty notes should at any rate indicate how 

 little is actually known of the life histories of the S. African 

 frogs and toads and perhaps also how quaintly interesting such 

 studies may be. 



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