Charles Spence Bate , or Spence Bate , FRS ( March 16 , 1819 â `` July 29 , 1889 ) was a British zoologist and dentist , who lived in Swansea and Plymouth . Charles Spence Bate , or Spence Bate , FRS ( March 16 , 1819 - July 29 , 1889 ) was a British zoologist and dentist , who lived in Swansea and later Plymouth .