in natural history, the name of a class of fossils, formed in detached masses, without any crusts; of no determinate figure or regular structure; and composed of a crystalline or sparry matter, debauched by an admixture of earth in various proportions. Under this class are comprehended, 1. The telaugia. 2. The petridia. 3. The lithozugia. 4. The jaspides or jaspers.