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From Henry Denny   23 January 1865

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Summary

Species of lice and the animals they infest. Different kinds of dogs, fowls, and pigeons are infested by the same species of Pediculi [see Descent 1: 219].

Author:  Henry Denny
Addressee:  Charles Robert Darwin
Date:  23 Jan 1865
Classmark:  DAR 80: B150–1
Letter no:  DCP-LETT-4753

From Henry Denny   30 October 1844

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Summary

Has never heard of species of same genus [of parasites] being found on both birds and mammals, or different genera and species being found on animals in the domestic and wild states. Implications of this for relationship of aperea and guinea-pig.

Author:  Henry Denny
Addressee:  Charles Robert Darwin
Date:  30 Oct 1844
Classmark:  DAR 205.3: 273
Letter no:  DCP-LETT-785
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letter (2)
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Darwin, C. R.disabled_by_default
Correspondent
Date
1844 (1)
1865 (1)