Percy Sladen

Walter Percy Sladen (30 June 1849 – 11 June 1900) was an English biologist who specialised in starfish.

The son of a wealthy leather merchant, Sladen was born near Halifax, Yorkshire on 30 June 1849. He was educated at Hipperholme Grammar School and Marlborough College, but received no university training. As a young man he indulged his hobby of natural history, but soon become fascinated with echinoderms. In 1876 he was elected a Fellow of the Linnean Society of London, and the following year became a Fellow of the Zoological Society of London. 1877 also saw the publication of his first paper, in which he split the sea-lily genus Poteriocrinus into four; in his lifetime, Sladen would gain a reputation as a "splitter" because of his proclivity for declaring specimens to belong to new genera or species. Late that year he began a long and fruitful collaboration with Duncan; which would see the publication of some 15 co-authored papers, many on fossils, over the course of twelve years.

From December 1878, Sladen spent three month at Naples under the auspices of the British Association for the Advancement of Science. His work there, on echinoderm pedicellariae, established his reputation as a leading authority on echinoderms, and in 1881 he was invited to organise and write up an account of the starfishes collected during the Challenger expedition. This would take him a decade to complete, and comprise nearly 1000 pages and 118 plates.

By 1890, Sladen married Constance Anderson of York. She was sister of Tempest Anderson the volcanologist, and Yarborough Anderson, a barrister. Her father William Charles Anderson was a surgeon and Sheriff of York.

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