This first is from Horae ad Usum Parisiensem, f 187r (15th century, in Latin). The left-hand image is of the entire page, and on the right below are two enlargements of the creature.
The next image is "a close-up of the snail-cat in f 70v of the Bibliothèque Mazarine's MS 62, NT Épîtres de Saint Paul. "
On this manuscript (by Dr. Shuker):
(originally the personal library of Cardinal Mazarin, the celebrated Italian cardinal and diplomat who served as Chief Minister to the French monarchy from 1642 until his death in 1661, the Bibliothèque Mazarine is the oldest public library in France). As its title suggests, this manuscript contains the Epistles of St Paul from the New Testament, written in the Vulgate Latin translation. It consists of 149 folios, dates from the final quarter of the 14th Century, and was originally owned by the Convent of the Minimes in the village of Nigeon, located on the hill of Chaillot, near Paris.
The image below is from
"Maastricht Hours as MS [Manuscript] Stowe 17. Written in Latin (using Gothic script), but with a calendar and final prayers in French, it was produced during the first quarter of the 14th Century in Liège, the Netherlands, probably for a noblewoman, who may be "represented as a kneeling female figure in several places throughout the manuscript" (Dr. Shuker)