Frederick Merrifield (1831 – 28 May 1924, Brighton) was an English barrister, entomologist and campaigner for women's suffrage.
Conspicuous effects on the markings and colouring of Lepidoptera caused by exposure of the pupae to different temperature conditions.
Frederick was also a member of the National Association for the Repeal of the Contagious Diseases Acts since the legislation adversely affected women.
[7] Frederick was also a spiritualist, but lost respect for the medium Daniel Dunglas Home after claiming to have observed him cheat.
At a séance in the house of the solicitor John Snaith Rymer in Ealing in July 1855, Merrifield observed that a "spirit-hand" was a false limb attached on the end of Home's arm.