The Book of Hours of Jeanne de France is in the Bibliothèque Nationale in Paris. This document is in Latin and originated around 1450. The illuminations have largely been made by Maître de Jouvenel des Ursins. 
The first part of this “Heures a l’usage de Paris” is a calendar with a zodiac. In folio 12 December and the sign of Capricorn is shown. In the lower border of f. 12v a goat peeks out of a dextral shell with two spiral bands and a slightly thickened lip. The shell is undoubtedly from a land snail, possibly a Helix species.
 BNF, Ms. Nouvelle Acquisition Latin 3244, 336 ff. http://bit.ly/1c6hFto.