Chinchilla (C. lanigera), a South American rodent, well known by its soft gray fur. Two related animals (Lagidium peruanum and Lagostomus trichodactylus, the Viscacha) form along with the true chinchilla the small family Chinchillidae in the porcupine section of the Rodent order. All the three are somewhat squirrel-like animals, but have long hind-legs, bushy tail, very soft fur, and complete collar-bones. The chinchilla and the lagidium occur on the higher Andes of Peru and Chili at a high elevation; the viscacha is found on the Pampas. The three genera differ distinctly, but not widely. The chinchilla proper has a body about a foot long, and the tail measures fully 6 inches. They are extremely active animals, and climb among the rocks with the greatest agility. They are killed in thousands for the sake of their fur, and prolific as they are, seem to be diminishing in abundance. The fur is used for various articles of attire, and the Peruvians are said to have formerly woven the hair into fine fabrics. See VISCACHA.