From John Morris 1 March 1856
Summary
Informs CD on age of land, freshwater, and marine Mollusca.
| Author: | John Morris |
| Addressee: | Charles Robert Darwin |
| Date: | 1 Mar 1856 |
| Classmark: | DAR 205.2: 246 |
| Letter no: | DCP-LETT-1835 |
Matches: 2 hits
- … Morris, John Darwin, C. R. …
- … R. Murchison in his Alps paper, but I have not the reference. I will look for it & others and write you again— The best evidence is (as you are aware) that the freshwater genera as genera have survived many mutations of the surface, and outlived many of the marine genera, of course I allude to the still living genera of Physa Planorbis, Melanopsis, Cyrena, Paludina, &c in the Purbeck & Wealden—so in the lower and middle tertiary, &c Yours sincerely | John Morris C Darwin …
