1665. Slugs are the greatest pests to all cultivated plants and roots, upon which they alone feed. Many species are found in Britain; that most common is the Limax agrestis (fig. 295. a), or small grey slug: its eggs (b) are small, round, somewhat transparent, and nearly white; they are deposited in small groups under the ground, and are generally hatched very early in spring. Slugs are well known as particularly injurious to the young shoots of wheat, and the early leaves of turnips, and all garden plants. Crows, rooks, and other birds, search for slugs, and devour them at all seasons.