I. INTESTINA, _Intestinal Animals_: simple, naked, and destitute of limbs: for example, the earth-worm, the guinea-worm, the leech, and the ascaris: 7 genera, 24 species. II. MOLLUSCA. Simple, naked animals, furnished with limbs: the slug, the sea-mouse, the sea-anemone, the cuttlefish, the sea-nettle, the star-fish, and the sea-urchin: 18 genera, 110 species. III. TESTACEA, _Shell-fish_. Soft, simple animals, covered with a shell which is usually calcareous. This order includes 36 genera, and 814 species. It is divided into three groups, the multivalve shells, or those which consist of several pieces; the bivalve, of two pieces; and the univalve, or those of one piece only. IV. LITHOPHYTA. Compound animals, affixed to, and fabricating a fixed calcareous base, called coral. There are 59 species, which are referred to 4 genera, the tubipores, madrepores, millepores, and cellepores. V. ZOOPHYTA. Compound animals, sending forth processes resembling flowers, and springing from a vegetating stem. This order contains 15 genera, among which are the red coral, the sea-fan, the sponge, coralline, &c. The number of species is 156. The characters of the genera and species of these orders are derived from so many various circumstances, that it would be tedious to recapitulate them. The number of objects defined in this part of the Systema Naturae, is as follows:-- Mammalia, 219 Birds, 930 Amphibia, 292 Fishes, 400 Insects, 2984 Vermes, 1163 Species from the Appendices, 140 In all, 6128 species of animals.