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To J. D. Dana   5 April [1857]

Summary

Asks whether Crustacea from temperate parts of the Southern Hemisphere are more strongly analogous to those in same latitudes of the Northern Hemisphere than are Arctic to Antarctic Crustacea.

Discusses astonishing finds of mammalian and reptilian remains in Purbeck beds; notes reactions of Lyell.

Has doubts about Richard Owen’s recent classification of mammals [J. Proc. Linn. Soc. Lond. (Zool.) 2 (1858): 1–37].

Works away [on Natural selection].

Asa Gray has given valuable assistance.

Author:  Charles Robert Darwin
Addressee:  James Dwight Dana
Date:  5 Apr [1857]
Classmark:  Yale University Library: Manuscripts and Archives (Dana Family Papers (MS 164) Series 1, Box 2, folder 44)
Letter no:  DCP-LETT-2072

From J. D. Dana   27 April 1857

Summary

In reply to CD’s query [see 2072], JDD describes what little is known about the crustacea of the Antarctic and southern lands.

Knows of no species of the cold temperate south identical with those of the cold temperate north.

Author:  James Dwight Dana
Addressee:  Charles Robert Darwin
Date:  27 Apr 1857
Classmark:  DAR 162: 39
Letter no:  DCP-LETT-2083

To J. D. Dana   25 May [1857]

Summary

Thanks him for information concerning Crustacea.

Comments on natural history study in the U. S.

Mentions work done by Huxley on Crustacea ["Description of a new crustacean", J. Geol. Soc. Lond. 13 (1857): 363–9];

John Lubbock on larvae of Diptera.

Author:  Charles Robert Darwin
Addressee:  James Dwight Dana
Date:  25 May [1857]
Classmark:  Yale University Library: Manuscripts and Archives (Silliman Family Papers (MS 450) Box 19, folder 25)
Letter no:  DCP-LETT-2094
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letter (3)
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1857
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05 (1)
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