"A large slug with a mantle that covers the entire dorsal surface. The mantle is tan to tan-grey with irregular mottling of slightly darker brown spots. These spots usually coalesce to form two bands near the lateral edges of the mantle as well as spots or broken bands bordering the center of the mantle. It is among the most arboreal of terrestrial mollusks. In the Northeast during damp weather this slug can be found feeding upon the thin film of algae high on tree trunks."-- From Carnegie Museum description. Found on Norway maple near Washington St.