The snail or house snail does not occur often in heraldry but is always shown in full, with shell on its back. A Glossary of Terms used in British Heraldry, J.H. Parker, Oxford, 1894, Entry:Snail In meaning can be read as a symbol of “deliberation and perserverance”. The Symbolisms of Heraldry, W. Cecil Wade, George Redway, London, 1898 P71