rhizostomata
Rhi`zo*stom"a*ta, n.pl. Etym: [NL., fr. Gr. (Zoöl.) Defn: A suborder of Medusæ which includes very large species without marginal tentacles, but having large mouth lobes closely united at the edges. See Illust. in Appendix.
Rhi`zo*stom"a*ta, n.pl. Etym: [NL., fr. Gr. (Zoöl.) Defn: A suborder of Medusæ which includes very large species without marginal tentacles, but having large mouth lobes closely united at the edges. See Illust. in Appendix.