Drawings, abdominal integument and mammary gland of the Echidna hystrix by [Richard Owen] Plate 17, figures 2-3 (labelled here as figures 1-2) showing part of the abdominal integument and the mammary gland of the Echidna hystrix [Tachyglossus aculeatus; short-beaked echidna]. Inscribed with publication and plate details. Below is a key to the letters labelling parts of the anatomy represented in the figures. A faint pencil outline of figure 1 is visible below the figures, to appear underneath figures 2 and 3 in the published plate. Not signed. Subject: Zoology Published in Philosophical Transactions as part of paper titled 'On the mammary glands of the Ornithorhynchus paradoxus' by Richard Owen. Read to the Royal Society on 21 June 1832. [1832]