Possibly V. theloides?
Found in leaf litter near limestone ledges and cliffs, or in limestone boulders, on forested mountain slopes.
ID is based on info from Daniel Dourson's book "Kentucky's Land Snails", and images here, but I am open to suggestions and alternate IDs!:
http://www.carnegiemnh.org/science/mollusks/va_imagegallery.html
ID’d using key from Gentz et al 2017.
This is a picture of Deroceras laeve at Kinder Farm Park in Millersville, Maryland.
This is a picture of Arion fuscus
at the Mckeldin Area of Patapsco Valley State Park in Carroll County, Maryland.