Full title: 'Underrättelse om några slags Polyper, som finnas i watnet omkring Greifswald'
Account of some kinds of polyps found in the waters around Greifswald, by Lampert Hinrich Röhl (1724-1790).
Sent in a letter by Alexander Bernhard Köplin to Carl Linnaeus, 19 November 1765 n.s. "The Linnaean correspondence", linnaeus.c18.net, letter L6029. Translation into Swedish of Prof. Röhl's paper, made by one of Prof. Köplin's Swedish pupils, but copied out by Köplin himself. Köplin writes that he also sent the original manuscript, which seems to be lost.