Great black slug
Arion ater agg.
An informal survey of the plant and animal life living in or visiting the grounds of Pointfield, Kelso since 2015
Molluscs: slugs
Large black or orange slug; head and tentacles black; mantle finely granular; body with coarse tubercles; no keel, no banding. Foot fringe with fine black stripes.
In wild flower border in September.