Drawings, 'Heifer' by [Martin Barry] Plate 8, figures 77-78 (labelled here as figures 76-77) showing an ovary with the outer third of a Graafian vesicle [ovarian follicle] in a female ox [Bos taurus; cattle]. Inscribed with figure details. Figures mounted on backing sheet. A red line divides the two figures. Red ink inscriptions next to figures reading '6' and '7' struck out in black ink. Figure numbers originally written in ink as '77' and '89', struck out in graphite. An ink inscription top left on backing paper reads '18'. 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]