A division of Invertebrata which includes the classes Brachiopoda
; -- called also Anthoid Mollusca
. [1913 Webster
" Originally the Tunicata were included under Molluscoidea, from which they are known to differ widely in structure and embryology. Molluscoidea were formerly considered a subdivision of Mollusca, but they are now known to have more relationship with Annelida than with Mollusca."