Remember how allied forms in the Hydrozoa differ in their so-called alternate generations; I follow those naturalists who look at all such cases as forms of gemmation; and a multitude of organisms have this power or traces of this power at all ages from the germ to maturity.

With respect to Agassiz's views, there were many, and there are still not a few, who believe that the same species is created on many spots.

I wrote to Bates, and he will send you his mimetic paper; and I dare say others: he is a first-rate man.
Your case of the wingless insects near the Rocky Mountains is extremely curious.

I am sure I have heard of some such case in the Old World: I think on the Caucasus.

Would not my argument about wingless insular insects perhaps apply to truly Alpine insects?
for would it not be destruction to them to be blown from their proper home?
I should like to write on many points at greater length to you, but I have no strength to spare.
LETTER 187.