+-- Zoanthidea (p. 404) ---+ | +-- Zoanthidae (p. 404). | +-- _Zaphrentidae_ (p. 406). +-- Antipathidea = Antipatharia (p. 407) | +-- Antipathidae (p. 408). | +-- Leiopathidae (p. 409). | +-- Dendrobrachiidae (p. 409). +-- Cerianthidea (p. 409). CTENOPHORA (p. 412). Class. Order. Family. TENTACULATA (p. 417) +-- CYDIPPIDEA (p. 417) | +-- Mertensiidae (p. 417). | +-- Callianiridae (p. 417). | +-- Pleurobrachiidae (p. 418). +-- LOBATA (p. 418) | +-- Lesueuriidae (p. 419). | +-- Bolinidae (p. 419). | +-- Deiopeidae (p. 419). | +-- Eurhamphaeidae (p. 419). | +-- Eucharidae (p. 420). | +-- Mnemiidae (p. 420). | +-- Calymmidae (p. 420). | +-- Ocyroidae (p. 420). +-- CESTOIDEA (p. 420) | +-- Cestidae (p. 420). +-- PLATYCTENEA (p. 421) +-- Ctenoplanidae (p. 421). +-- Coeloplanidae (p. 422). NUDA (p. 423) Beroidae (p. 423). ECHINODERMATA (p. 425). Sub-Phylum. Class. Order. Sub-Order. Family. Sub-Family. ELEUTHEROZOA (p. 430) +-- ASTEROIDEA (pp. 430, 431) | +-- SPINULOSA (pp. 461, 462) | | +-- Echinasteridae (p. 462). | | +-- Solasteridae (p. 462). | | +-- Asterinidae (p. 463). | | +-- Poraniidae (p. 464). | | +-- Ganeriidae (p. 464). | | +-- Mithrodiidae (p. 464). | +-- VELATA (pp. 461, 464) | | +-- Pythonasteridae (p. 464). | | +-- Myxasteridae (p. 464). | | +-- Pterasteridae (p. 466). | +-- PAXILLOSA (pp. 461, 466) | | +-- Archasteridae (p. 466). | | +-- Astropectinidae (p. 467). | | +-- Porcellanasteridae (p. 470). | +-- VALVATA (pp. 461, 471) | | +-- Linckiidae (p. 471). | | +-- Pentagonasteridae (p. 471). | | +-- Gymnasteridae (p. 471). | | +-- Antheneidae (p. 471). | | +-- Pentacerotidae (p. 471). | +-- FORCIPULATA (pp. 462, 473) | +-- Asteriidae (p. 473).