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.