Search: Charles Darwin in collection 
Darwin, C. R. in correspondent 
Waterhouse, G. R. in correspondent 
1850-1859::1855 in date 
Cambridge University Library in repository 
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From:
George Robert Waterhouse
To:
Charles Robert Darwin
Date:
[after 2 Mar 1855]
Source of text:
DAR 47: 133–4
Summary:

Gives instances of sexual differences in the number of tarsi within species of Coleoptera and also variation in the number of tarsi between related species.

Contributor:
Darwin Correspondence Project
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From:
George Robert Waterhouse
To:
Charles Robert Darwin
Date:
[7 Mar 1855]
Source of text:
DAR 181: 20
Summary:

Comparison of skulls of Ichthyosaurus and Cetacea.

Contributor:
Darwin Correspondence Project