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n. pl.1.(Zool.) A division of acalephs in which the development is direct from the eggs, without a hydroid stage. Some of the species are parasitic on other medusæ.
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in periodicals archive ?
The ultrastructure of the radial neuromuscular system of the jellyfish Liriope tetraphylla (Hydrozoa, Trachymedusae): implications in crumpling behavior.
Leptothecata: Phialellidae Cnidaria: Hydrozoa: Lytocarpus phillippinus Leptothecata: Plumulariidae (Kirschenpauer, 1872) Cnidaria: Hydrozoa: Sertularia exigua Allman, 1877 Leptothecata: Sertulariidae Thuiaria crisiodes (Lamouroux, 1824) Cnidaria: Hydrozoa: Solmundella bitentaculata Narcomedusae: Aeginidae (Quoy & Gaimard, 1833) Cnidaria: Hydrozoa: Cunina octonaria McCrady, 1859 Narcomedusae: Cuninidae Solmaris rhodoloma (Brandt, 1838) Cnidaria: Hydrozoa: Agalma elegans (Sars, 1846) Physonectae: Agalmidae Agalma okeni Eschscholtz, 1825 Nanomia bijuga (Chiaje, 1841) Cnidaria: Hydrozoa: Forskalia edwarsi Kolliker, Physonectae: Forskaliidae 1853 Cnidaria: Hydrozoa: Liriope tetraphylla (Chamisso Trachymedusae: Geryoniidae & Eysenhardt, 1821) Cnidaria: Hydrozoa: Aglantha sp.