Paper, 'On the impregnation of the ovum in the amphibia' by George Newport Subject: Zoology Published in Philosophical Transactions as 'On the impregnation of the ovum in the amphibia. (First series.)'. Received and read by the Royal Society on 20 June 1850. Abstract published in Abstracts of the Papers Printed in the Philosophical Transactions of the Royal Society of London [later Proceedings of the Royal Society of London], Volume 5, 1851. [1850]