Robert Boog Watson FRSE (26 September 1823 – 23 June 1910) was a Scottish malacologist and minister of the Free Church of Scotland best known as the author of the report on the Scaphopoda and Gastropoda collected during the H.M.S. Challenger expedition to survey the world's oceans from 1873 to 1876.[1] Watson also described various Opisthobranchia from Madeira.[2]