- Pennatula by Webster's
(n.) Any one of numerous species of Pennatula, Pteroides, and allied genera of Alcyonaria, having a...
- Alcyonacea by Webster's
(n.pl.) A group of soft-bodied Alcyonaria, of which Alcyonium is the type. See Illust. under...
- Actinaria by Webster's
(n.pl.) A large division of Anthozoa, including those which have simple tentacles and do not form...
- Madreporaria by Webster's
(n.pl.) An extensive division of Anthozoa, including most of the species that produce stony corals....
- Heteromyaria by Webster's
(n.pl.) A division of bivalve shells, including the marine mussels, in which the two adductor...