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From Henry Denny 23 January 1865
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
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 |
