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who considers how inany of the seeds of a Strawberry are empty, and do not 

 germinate at all. In any case it may be granted that free-growing Strawberry 

 plants are occasionally disseminated by snails and slugs, and it is possible that, 

 in the course of ages, these animals by unconscious selection have converted a 

 dry receptacle into a fleshy mass. May it also be inferred from what has been 

 said that slugs are attracted by the fragrance, and consequently are provided with 

 an organ of smell? And that, moreover, they are able to distinguish between 

 the red of the fruits and the green of the leaves? 



