ORDER II. The MOLLUSCA, are likewise simple na-
ked animals, without any shell; but they are brachi- Vermes.
ated, or furnished with a kind of limb.—This order comprehends 31 genera, viz. Actinia, Clava, Mammaria, Pedicellaria, Afeidia, Salpa, Dasya, Pterotrachea, Limax, Aplysia, Doris, Teuthis, Holothuria, Terebella, Triton, Sepia, Clio, Lobaria, Lerna, Scylla, Glaucus, Aphrodita, Amphitrite, Spio, Nerita, Nais, Physophora, Medusa, Lucernaria, Asterias, Echinus.