To Pieter Harting   21 March 1871

Down. | Beckenham | Kent. S.E.

Mar. 21 1871

Dear Sir

I am much obliged to you for your great kindness in sending me your fine Memoir on Potérion.1

With my best thanks & much respect | I beg leave to remain | dear Sir | yours very faithfully | Charles Darwin

CD refers to P. Harting 1870; CD’s copy has not been found. Poterion is a synonym of Cliona (a sponge genus) in the family Clionidae (World register of marine species, www.marinespecies.org (accessed 10 September 2009)).

Please cite as “DCP-LETT-7606,” in Ɛpsilon: The Charles Darwin Collection accessed on 5 June 2025, https://epsilon.ac.uk/view/dcp-data/letters/DCP-LETT-7606