The Skyrrid, or Holy Mountain, is so called because it was divided at the Crucifixion. One part of it is in America. There has been no snail upon it ever since, or worm either: that is because it is sacred; they cannot go there. (Collected at Bromyard, 1909)
ELLA M. LEATHER.
Any religion that refuses entry to worms and snails is of no use to me. From p110 in
Welsh Folklore Items, I
E. J. Dunnill; Ella M. Leather
Folklore, Vol. 24, No. 1. (Mar., 1913), pp. 106-110.