Darwin-Hooker Letters : Letter from C. R. Darwin to J. D. Hooker 15 November [1854]
Darwin, Charles Robert
Darwin-Hooker Letters
<p style='text-align: justify;'>Calculating small number of species in aberrant genera of insects and plants.</p><p style='text-align: justify;'>Joachim Barrande’s "Colonies", Élie de Beaumont’s "lines of Elevation", Forbes’s "Polarity" make CD despair, as these theories lead to conclusions opposite to CD’s from the same classes of facts.</p>