From:
James Dwight Dana
To:
Charles Robert Darwin
Date:
8 Dec 1856
Source of text:
DAR 205.9: 378
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".
Contributor:
Darwin Correspondence Project
