Fleuriel - Notre Dame

The 12th century church "Notre-Dame de Fleuriel" was once the seat of a priory, connected the abbey in Tournus. Now it is the parish church. It is known for the western portal. I had read, that it is one of the finest in the area of Bourbonnais.

A very cryptic carving.
A giant snake, with the head of a cat or lion? - Could be, but the semicircular rolls, seen here are not connected. It seems a like a labyrinth, but these are just eleven semicircular rolls, crowned by a smiling cat. The artist carved two nice cones on the edges. And what were the holes used for?