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 |
