Drawing, 'Pigeon' by [Martin Barry] Plate 8, figure 76 (labelled here as figure 75) showing an ovisac with its vascular covering in a pigeon [Columba livia]. Inscribed with figure details. Figure drawn separately and mounted on backing sheet. A red ink inscription next to figure reading '190' is struck out in black ink. Figure number originally written in ink as '83', struck out in graphite. Not signed. The manuscript for this paper is wanting. Subject: Biology / Zoology Published in Philosophical Transactions as part of paper titled 'Researches in embryology. First series' by Martin Barry Received by the Royal Society on 20 June 1838. Read 21 June 1838. [1838]