Thanks JGF for geological information.
Steenstrup's cirripede specimens have been of great use and interest. CD has now described 33 fossil pedunculated cirripedes.
Down Farnborough Kent
My dear Forchhammer
I ought to have written sooner to have thanked you very sincerely for your letter of
Prof. Steenstrup's specimen which I owe first to your kindness have been of
great use & interest to me: I have now described 33 fossil
Pedunculated Cirripides, & they are in M
With my very sincere thanks | Believe me | Yours very truly | Charles Darwin
- f1 1328.f1The letter has not been found. The geological information may have been in answer to letter to J. J. S. Steenstrup, 3 April , asking about the relationship of the chalk formations of Scania, Faxoe, and Westphalia. In Fossil Cirripedia (1851): 7, CD cited Forchhammer and Steenstrup as his authorities for considering them equivalent formations, more recent than the common Upper or White Chalk and equivalent to the formation of Maastricht.