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Sir Gavin Rylands de Beer was a British evolutionary embryologist, known for his work on heterochrony as recorded in his 1930 book Embryos and Ancestors. He was director of the Natural History Museum, London, president of the Linnean Society of London, and a winner of the Royal Society's Darwin Medal for his studies on evolution

Captain Cyril Diver was a civil servant and amateur naturalist. He became the first Director-General of the Nature Conservancy

of the Department of Antiquities in Jos