Charles Spence Bate, or Spence Bate, FRS (March 16, 1819 - July 29, 1889) was a Britishzoologist and dentist, who lived in Swansea and later Plymouth. He was an authority on the crustacea, and a frequent correspondent with Charles Darwin, mostly concerning their shared interest in barnacles. Together with J. O. Westwood, he wrote "A history of the British sessile-eyed Crustacea". The Royal Society of London is claimed to be the oldest learned society still in existence and was founded in 1660. ... March 16 is the 75th day of the year in the Gregorian Calendar (76th in Leap years). ... 1819 was a common year starting on Friday (see link for calendar). ... July 29 is the 210th day (211th in leap years) of the year in the Gregorian Calendar, with 155 days remaining. ... 1889 was a common year starting on Tuesday (see link for calendar). ... Zoology (Greek zoon = animal and logos = word) is the biological discipline which involves the study of animals. ... X-rays can reveal if a person has cavities Dentistry is the practical application of knowledge of dental science (the science of placement, arrangement, function of teeth) to human beings. ... Swansea (Welsh: Abertawe - aber river-mouth + river Tawe) is a city and county in South Wales, situated on the coast, immediately to the east of the Gower peninsula in the traditional county of Glamorgan. ... This article is about Plymouth, England. ... Classes Remipedia Cephalocarida Branchiopoda Ostracoda Maxillopoda Malacostraca The crustaceans (Crustacea) are a large group of arthropods (55,000 species), usually treated as a subphylum. ... Charles Darwin, about the same time as the publication of The Origin of Species. ... Orders Ascothoracica Acrothoracica Thoracica Rhizocephala A barnacle is a type of arthropod belonging to infraclass Cirripedia in the subphylum Crustacea and is hence distantly related to crabs and lobsters. ...