Charles Doolittle Walcott

Charles Doolittle Walcott (March 31, 1850 – February 9, 1927) was a American paleontologist.

He served as head of the US Geological Survey and later became Secretary of the Smithsonian Institution after the death of Samuel Pierpont Langley, holding the latter post until his own death.

He collected fossils at the Burgess Shale.