Curator of Geology at the Yorkshire Museum 1893-1907. Specialist on fossil Brachiopoda; his collection of
Cretaceous and Jurassic Brachiopoda in Natural History Museum;
Shenley Limestone Brachiopoda in IGS.
Walker recognized that a
single specimen could not adequately represent the range of
morphology occurring within a species and his favorite dictum
became: "It would be good for palaeontology, if all type specimens
were destroyed"
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