This Book of Hours à l’usage de Chalon-sur-Saône, originated from the early 16th century (1501-1510); the illuminations are attributed to Guillaume II Leroy and his studio. It is in the Bibliothèque Municipale in Lyon .
On folio 72v a snail is seen in the border at left. The animal is somewhat stylized, with an eye-spot, seemingly close friends with a ladybug. The sinistral shell has impressions of ribs, nearly three whorls; this is an imaginary species.
 Lyon BM, Ms. 6881, 112 ff. http://initiale.irht.cnrs.fr/ouvrages/ouvrages.php?id=-1&typeAffichage=liste&bloc_recherche_ouvrage=none&bloc_resultats_ouvrage=block&page=1&resetForm=1&imageInd=-1&codexId=-1&idMedium=100044532