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Darwin, C. R. in correspondent 
Müller, Fritz in correspondent 
1870-1879::1879 in date 
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From:
Charles Robert Darwin
To:
Johann Friedrich Theodor (Fritz) Müller
Date:
4 Mar 1879
Source of text:
The British Library (Loan MS 10 no 48)
Summary:

Has sent FM’s letter on caddis-fly to Nature ["On a frog and caddis-flies", Nature 19 (1879): 462–4].

Contributor:
Darwin Correspondence Project
From:
Johann Friedrich Theodor (Fritz) Müller
To:
Charles Robert Darwin
Date:
21 Jan 1879
Source of text:
Nature , 20 March 1879, pp. 463–4
Summary:

Has lately found frog that has eggs on its back.

Pupae of caddis-flies living on rocks have lost fringe of hairs on their feet. In species that live in the water these are used for swimming.

Contributor:
Darwin Correspondence Project