trachymedusae
Tra`chy*me*du"sæ, n. pl. Etym: [NL., fr.Gr. medusa.] (Zoöl.) Defn: 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.
Tra`chy*me*du"sæ, n. pl. Etym: [NL., fr.Gr. medusa.] (Zoöl.) Defn: 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.