Cutting.—On Androgynous Receptacles in Marchantia. 357 
have often been premature, and it is certain, as has been pointed out by 
Bateson (1 and 2 ), that the results obtained in one field of observation often 
differ from those in others. It may also be, as he has suggested, that 
the inheritance of sex is differently arranged in different species. 
University College, London, 
December , 1909. 
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