Plate, pseudoembryo losing organs of assimilation and locomotion by [Edwin M Williams] Figure 1 from plate XXV showing the pseudoembryo of the Antedon rosaceus losing its special organs of assimilation and locomotion as it begins passing into the pentacrinoid stage. See PT/71/1/15-16 for more advanced stages of this process. Subject: Oceanography Published in Philosophical Transactions as 'On the embryogeny of Antedon rosaceus, Linck (Comatula rosacea of Lamarck)'. Communicated by Thomas Henry Huxley. Received by the Royal Society on 29 December 1862. Read 5 February 1863. December 1862