Ancestry links to Royal Marines Registers of Service

Ancestry identifies this database as "Web: UK, Royal Marines Registers of Service Index, 1842-1925' with 106,915 index records. Web means its an index to content held elsewhere. In this case the source is The National Archives of the UK (TNA), Kew, Surrey, England. Series ADM 159. http://www.nationalarchives.gov.uk/records/royal-marines-register-service.htm

Commissioned officers of the Royal Marines records in series ADM 196, covering officers who joined the Royal Navy between 1756 and 1931, are at http://www.nationalarchives.gov.uk/records/royal-naval-officers-service-records.htm