Vocabulary : Selachian to Seldem
Selachian : One of the Selachii. See Illustration in Appendix.Selachii : An order of elasmobranchs including the sharks and rays; the Plagiostomi. Called also Selacha, Selache, and Selachoidei.
Selachoidei : Same as Selachii.
Selachostomi : A division of ganoid fishes which includes the paddlefish, in which the mouth is armed with small teeth.
Selaginella : A genus of cryptogamous plants resembling Lycopodia, but producing two kinds of spores; also, any plant of this genus. Many species are cultivated in conservatories.