You searched for: “malacozoic
malacozoic (adjective) (not comparable)
Pertaining to the Malacozoa or soft-bodied animals: Molacozoic organisms form an extensive group of invertebrates consisting of the Bryozoa, Mollusca, and Brachiopoda. e.g. the Mollusca.

The Mollusca is Huxley's term for the series of animals from the lowest Polyzoa to the highest molluscs.