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From Robert McLachlan   24 February 1868

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Summary

Reports that when August Meyer confined several distinct species of Phryganeidae they coupled and produced fertile ova, indicating that some specific characters are not so important so far as reproduction is concerned [see Descent 1: 342 n. 2].

Author:  Robert McLachlan
Addressee:  Charles Robert Darwin
Date:  24 Feb 1868
Classmark:  DAR 82: A86–7
Letter no:  DCP-LETT-5924
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letter (1)
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Correspondent
Darwin, C. R.disabled_by_default
McLachlan, Robertdisabled_by_default