...These differences do not constitute the diagnostic marks of transcendent or immanent essences; they are 'merely artificial combinations made for convenience'. 'This may not be a cheering prospect', said Darwin, 'but we shall at least be freed from the vain search for the undiscovered and undiscoverable...

..."nature." Owen's alarm may arise from Darwin's assertion near the end of The Origin of Species that "we shall have to treat species in the same manner...genera are merely artificial combinations made for convenience."24 To a certain extent Owen has just clouded the issue: Darwin would not have denied Linnaeus'...

...sterility nor fertility affords any clear distinction between species and varieties, (p. 248) In short, we shall have to treat species in the same manner...merely artificial combinations made for convenience, (p. 485) And in a letter to Hooker (December 24, 1856) Darwin wrote: "I have just been comparing definitions...

...varieties is one of degree, not of kind. To adopt his theory, Darwin claimed, would free biologists "from the vain search for the undiscovered and undiscoverable essence of the term species." 68 Naturalists would then not be incessantly haunted by the shadowy doubt whether this or that form...

...Lyell and Hopkins, that seems a reasonable interpretation of passages like the following: "In short, we shall have to treat species in the same manner...genera are merely artificial combinations made for the sake of convenience" (Origin, 485). Louis Agassiz also interpreted Darwin — as a "transmutationist"...

...acknowledged to be merely varieties may hereafter be thought worthy of specific names. ... In short, we shall have to treat species in the same manner...undiscovered and undiscoverable essence of the term species.16 In biology itself, Darwin's achievement has been as he anticipated, but it has not had the...

...primrose and cowslip; and in this case scientific and common language will come into accordance. In short, we shall have to treat species in the same manner...undiscovered and undiscoverable essence of the term species. The other and more general departments of natural history will rise greatly in interest. The terms...

...primrose and cowslip; and in this case scientific and common language will come into accordance. In short, we shall have to treat species in the same manner...cheering prospect; but we shall at least be freed from die vain search for die undiscovered and undiscoverable essence of die term species. The other and...

...specific names; and in this case scientific and common language will come into accordance. In short, we shall have to treat species in the same manner...undiscovered and undiscoverable essence of the term species. From this passage it is abundantly clear that Darwin considered the taxonomist's task in recognising...

...present day by intermediate gradations, whereas species were formerly thus connected ... In short, we shall have to treat species in the same manner...for the undiscovered and undiscoverable essence of ... species' (ibid., pp. 455 and 456). The assumptions which Darwin's theory thus commits him to challenge...