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Crotch, W. D. in correspondent 
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From:
William Duppa Crotch
To:
Charles Robert Darwin
Date:
25 Jan 1861
Source of text:
DAR 47: 173–4
Summary:

Physiological changes in Shetland ponies and seagulls resulting from change in diet.

Reports on the discovery of eyeless beetles in cellar [i.e., not caves]. How did they get there, and whence?

Contributor:
Darwin Correspondence Project
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From:
William Duppa Crotch
To:
Charles Robert Darwin
Date:
10 Apr 1865
Source of text:
DAR 161: 274
Summary:

Supports Atlantis hypothesis.

Contributor:
Darwin Correspondence Project
From:
William Duppa Crotch
To:
Charles Robert Darwin
Date:
24 Oct 1871
Source of text:
DAR 88: 114–15
Summary:

Gives possible explanation for retention of horns throughout the winter by female reindeer.

Work on Atlantis.

Contributor:
Darwin Correspondence Project
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From:
William Duppa Crotch
To:
Charles Robert Darwin
Date:
17 Nov 1872
Source of text:
DAR 88: 116a–b
Summary:

Horns of female reindeer disappear after their calves are dropped [see Descent, 2d ed., p. 503].

Lemmings in Norway.

Contributor:
Darwin Correspondence Project
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From:
William Duppa Crotch
To:
Charles Robert Darwin
Date:
14 Nov 1873
Source of text:
DAR 88: 127–8
Summary:

Sends information on shedding of reindeer horns in males and females.

Lemmings.

Contributor:
Darwin Correspondence Project
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