Darwin-Hooker Letters : Letter from Darwin, C. R. to Hooker, J. D. on 11 [Dec 1854]

Darwin, C. R.

Darwin-Hooker Letters

Debates aberrant species, e.g., Ornithorhynchus and Echidna, with Hooker. Darwin argues they are result of extinction having removed intermediate links to allied forms. Studying effects of disuse in wings of tame and wild ducks. Tabulations showing that number of species in a genus is not correlated with number of genera in an order.

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