Darwin and the Barnacle

Robert Grant (1793-1874)

Sponge

Flustra (Bryozoa)

Jellyfish life cycle

http://darwin-online.org.uk/EditorialIntroductions/Richmond_cirripedia.html

Lippson, A.J. & Lippson, R.L. 1984. Life in the Chesapeake Bay. Johns Hopkins University Press.