Sigillaria, vii, 180.
—, in coal fields near Liverpool, xlv, 403.
—, relation to Stigmariæ, xlix, 227.
—, marineria, xxxi, 30.f
Stigmaria, vii, 180.
—, relation to Sigillariæ, xlix, 227.
Strobilus caryophyllus, xxxi, 32.f
Syringodendron, vii, 180.
—, Kirtlandius, xxxi, 29.f
—, trees and wood, see under [Fossil.]