Sends notes on Infusoria for Ehrenberg.
Comments on distribution of species in natural orders that have local distributions. Intermediate forms between species of Lycopodium.
Showing 1–5 of 5 items
Sends notes on Infusoria for Ehrenberg.
Comments on distribution of species in natural orders that have local distributions. Intermediate forms between species of Lycopodium.
Origin of Antarctic brash ice.
Further on case of Lycopodium: does JDH know any genera of plants whose species are variable in one continent but not in another? Discussion on variations between floras as regards species richness, and factors affecting geographical distribution. On species, CD expects "that I shall be able to show even to sound naturalists that there are two sides to the question of the immutability of species; – that facts can be viewed and grouped under the notion of allied species having descended from common stocks". Mentions books and papers for and against species mutability. CD believes past absurd ideas arose from no one’s having approached subject on side of variation under domestication.
Would like to see Clarke’s paper
and would welcome visit from JDH.
Differences in variability of species within a single genus. Further observations on Lycopodium.
Interested in Humboldt’s river with different floras on opposite banks, and other unexplained cases of very local distributions.
Would like JDH to visit. Regrets he will not be fit to visit JDH.
Would like to visit on the weekend of 7–8 December.
Differences in floras of St Helena and Ascension.