| First Grand Division, VERTEBRATA, or back boned animals, having a bony skeleton, and including four classes. |
| Class | I. | Mammalia, or sucking animals; as, man; bats, monkeys, bears, oxen, sheep, deer, and many other four-footed beasts; as well as seals, walruses, whales, &c. |
| ″ | II. | Aves, birds of all kinds. |
| ″ | III. | Reptilia, or reptiles; as, lizards, frogs, serpents, toads, &c. |
| ″ | IV. | Pisces, fishes generally. |
| Second Grand Division, INVERTEBRATA, or animals without a bony spine, or a bony skeleton, and including three classes. |
| Class | I. | Mollusca, embracing pulpy animals mostly enclosed in shells; as, the nautilus, oyster, clam, cuttle-fish, &c. |
| ″ | II. | Articulata, or jointed animals; as, crabs, lobsters, spiders, insects, leeches, earthworms, &c. |
| ″ | III. | Radiata, branched or radiated animals; as, the star-fish, tape-worm, coral insect, sea anemone, &c. |