Fig. 61.—The arms of John of Brittany (de Bretagne), Earl of Richmond, the second surviving son of John II, Duke of Brittany, by his wife Beatrice, a daughter of King Henry III of England, which made John the nephew of King Edward I. Blazon: <i>Chequy or and azure, a bordure gules charged with lions passant guardant or over all a canton ermine</i> The bordure is known as "a bordure of England", being a representation of the Plantagenet royal arms of England. The canton ermine is a feature of the arms of the Duke of Brittany.
<bdi><a href="https://en.wikipedia.org/wiki/en:Arthur_Charles_Fox-Davies" class="extiw" title="w:en:Arthur Charles Fox-Davies"><span title="British writer (1871-1928)">Arthur Charles Fox-Davies</span></a>
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A Complete Guide to Heraldry.