Drawings, reproductive organs of common earthworm by [Thomas Williams] Plate 6, figures 6-8 showing the male and female reproductive organs from a common earthworm [Lumbricus terrestris]. Inscribed recto and verso with publication and plate details. Not signed. The manuscript for this paper is wanting. Subject: Marine Biology Published in Philosophical Transactions as part of paper titled 'Researches on the structure and homology of the reproductive organs of the annelids' by Thomas Williams. Received by the Royal Society on 30 December 1856. Read 12 February 1857. [1856]