Paper, 'Observations on the genus Ocythoë of Rafinesque with a description of a new species' by Wm [William] Elford Leach Illustrations for this paper have been separated from the manuscript and are found at PT/73/6/14-16. Subject: Zoology Published in Philosophical Transactions as 'Observations on the genus of Ocythoë Rafinesque, with a description of a new species'. Read 5 June 1817. 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 2, 1833. [1817]