. Cassell's natural history. Animals; Animal behavior. SUG ^lUION iTtll, IIUCK AKION ') in tlu' ground. Twenty-two species are rather gorges, upon worms. The feel)!cness of the .sliell-producing functions in the Limacuhi: is largely compensated by the faculty of secreting mucus of a particularly kind from all parts of tiie body. The Slug will lower itself to the ground from a tree or shrubâeven from a shelf when l>rought into a roomâby the mere accumulation of mucus at the extremity of the tail hardening into a gelatinous thread. The animal functions are not suspended during hiberna
. Cassell's natural history. Animals; Animal behavior. SUG ^lUION iTtll, IIUCK AKION ') in tlu' ground. Twenty-two species are rather gorges, upon worms. The feel)!cness of the .sliell-producing functions in the Limacuhi: is largely compensated by the faculty of secreting mucus of a particularly kind from all parts of tiie body. The Slug will lower itself to the ground from a tree or shrubâeven from a shelf when l>rought into a roomâby the mere accumulation of mucus at the extremity of the tail hardening into a gelatinous thread. The animal functions are not suspended during hibernation and at other periods, as in the Snail; and the animal is at all times more tenacious of life. The contiimed secretion of mucus is necessary to the Slug's existence. When this faculty ceases and the integuments ilry, the animal ; (Reeve.) Genus Limax. Limax has the foot pointed behind and keeled throughout tlu' back ; the mantle is shield-shap(>d, and placed on the anterior portion of the back ; the breathing orifice is on the light side, near the hinder maigin of the mantle. The creeping disc extends the whole length of tli animal, but they frequently litl up their heads like the Sniil, n 1 move their tentacles in seanh of objects above them. When alarmed, they withdraw the head beneath the mantle and contract the foot. In dry weather and in winter they bury themselvc found living in Europe and the Canary Islands. Genus Avion. The Slugs of this genus are distinguished from those of Limax proper by the pre- sence of a pore or gland, for the more copious secretion of mucus, at the extremity of the tail, and in liaving tlie pulmonary sac and overlapping shield nearer the head, with the respiratory orifice in front. The shield has no internally developed shell, its place being occupied by merely a few calcareous grains, which are sometimes isolated, sometimes aggregated into a rude irregular mass. The body is enveloped by integuments of considerable density, ris
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