Paper, 'Preliminary notice of an investigation into the coagulation of the perivisceral fluid of the sea-urchin' by E A [Edward Albert Sharpey] Schafer Sharpey-Schafer writes that 'The perivisceral fluid of the sea-urchin is a coagulable fluid of about the same specific gravity and chemical composition as sea­ water.' Annotations in pencil and ink. Subject: Zoology Received 8 November 1882. Read 7 December 1882. A version of this paper was published in volume 34 of the Proceedings of the Royal Society as 'Preliminary notice of an investigation into the coagulation of the perivisceral fluid of the sea-urchin'. 1882