What is an order of Tunicata, including Appendicularia, and allied genera; -- so called because certain larval features are retained by them through life. Called also Copelata. See Appendicularia called?

larvalia — An order of Tunicata, including Appendicularia, and allied genera; -- so called because certain larval features are retained by them through life. Called also Copelata. See Appendicularia. (Webster's 1913.)

Sources