large mottled (leopard-pattern) grey slug

Observation - large mottled (leopard-pattern) grey slug - UK and Ireland. Description: LARGE SILVER GREY slugs with small mottled dark leopard-skin blotches on mantle and leopard-skin like striations running down main body; found under bark of decaying log, two near each other. Nearby several piles of slug eggs, some pearl white and other

LARGE SILVER GREY slugs with small mottled dark leopard-skin blotches on mantle and leopard-skin like striations running down main body; found under bark of decaying log, two near each other. Nearby several piles of slug eggs, some pearl white and other group distinctly gold-like translucence. Slugs about 7-10 cm long