Yellow-shelled Semi-Slug

Parmarion martensi is an elongated semi-slug, with a visceral hump most of the mantle is covered by a small oval plate-like shell. The tail has a pale cream stripe that ends above the short horn on the back of the body. The shell is often covered by mantle tissue which is not always visible. The color of the body varies from pale gray to very dark brown sometimes with an orange tinge.