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From J. D. Dana 8 September 1856
Summary
Responds to CD’s query about the blind fauna of Mammoth Cave.
Gives information from L. Agassiz. Distribution of Crustacea, especially along southern coastlines.
Author: | James Dwight Dana |
Addressee: | Charles Robert Darwin |
Date: | 8 Sept 1856 |
Classmark: | DAR 205.3: 269 (Letters), DAR 162: 38 |
Letter no: | DCP-LETT-1951 |
From J. D. Dana 8 December 1856
Summary
Agassiz has informed him that the mice and rats of Mammoth Cave are American in type.
Alludes to CD’s doubt of the principle that "progress of life on the globe is parallel with the development in different tribes". Outlines his own ideas on the "unfolding of the type-idea" and its "parallelism with the law of development in the embryo".
Author: | James Dwight Dana |
Addressee: | Charles Robert Darwin |
Date: | 8 Dec 1856 |
Classmark: | DAR 205.9: 378 |
Letter no: | DCP-LETT-2016 |