I am very glad that you have added your justification in regard to the metamorphoses of insects; for your conclusion now seems in the highest degree probable.

(227/2.

See "Facts and Arguments for Darwin," page 119 (note), where F.Muller gives his reasons for the belief that the "complete metamorphosis" of insects was not a character of the form from which insects have sprung: his argument largely depends on considerations drawn from the study of the neuroptera.) I have re-read many parts, especially that on cirripedes, with the liveliest interest.

I had almost forgotten your discussion on the retrograde development of the Rhizocephala.

What an admirable illustration it affords of my whole doctrine! A man must indeed be a bigot in favour of separate acts of creation if he is not staggered after reading your essay; but I fear that it is too deep for English readers, except for a select few.
LETTER 228.