Paintings, earthworm by Franz [Andreas] Bauer Plate 18 showing external and dissected details of the earthworm including: figure 5, an external view of the mouth and head; figure 6, the external appearance of the sexual organs. Various magnifications. Inscribed with publication and plate details. Signed in ink lower left 'Franz Bauer del.' Royal Society stamp verso. Embossed stamp lower right, crown design with the inscription 'Bristol Paper'. Subject: Zoology / Physiology Published in Philosophical Transactions as part of paper titled 'On the double organs of generation of the lamprey, the conger eel, the common eel, the barnacle, and earth worm, which impregnate themselves; though the last from copulating, appear mutually to impregnate one another' by Everard Home. Read to the Royal Society on 27 February 1823. [1823]