prop. n. plLarvalia(Zoöl) 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.
Century Dictionary and Cyclopedia
larvaliaOne of two classes of tunicates or ascidians (the other being Saccata), considered as a branch of vertebrates under the name Urochorda (which see). The Larvalia consist of the Appendiculariæ, or those ascidians which retain the urochord throughout life. E. R. Lankester.