Thanks for Edward Forbes’s letter. Botanical evidence conflicts with parts of his theory but supports others. Is becoming more of a migrationist.

Bentham agrees with JDH on polymorphism.

No summary available.

Describes Infusoria in Rio Gallegos samples.

"Fluthgebiete" means estuary deposit.

Discusses dust samples from Malta. Asks for further samples.

Agrees with JDH about Forbes’s views.

Discusses A. Saint-Hilaire’s lectures and asks on what grounds botanists judge the relative "highness" of plants.

C. G. Ehrenberg wants specimen grasses from Ascension Island.

JDH recognises the existence of "altered states" of continental species in island floras. The botanists’ difficulty in determining a new species is no grounds for dismissing the important question of altered forms.

Will look for Ascension plants for Ehrenberg.

French Galapagos collections confirm JDH’s view that plants arrived from north.

Cannot agree with Forbes on North Atlantic flora.

Botanical definition of "highness" and "lowness" usually means complexity and simplicity.

Some plants, such as aquatic ones, are cleistogamous. Cannot see why they should not be.

If JDH can send grasses CD will write to Ehrenberg enclosing them.

Sends a list of mammalian remains found in the Buenos Aires district and purchased by the British Museum.