The Geological History of PlantsD. Appleton & Company, 1892 - 294 pagini |
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Pagina 23
... branches or young stems , and the elaborate examinations kindly undertaken for me by Professor Penhallow and referred to in a note to this chapter , have induced me to modify this view , and to hold that the tissues of these singular ...
... branches or young stems , and the elaborate examinations kindly undertaken for me by Professor Penhallow and referred to in a note to this chapter , have induced me to modify this view , and to hold that the tissues of these singular ...
Pagina 29
... branches of Conifers of the genus Brachyphyllum . Nereites and Planulites are tracks and burrows of worms , with or without marks of setæ , and some of the * The name Bilobites was originally proposed by De Kay for a bivalve shell ...
... branches of Conifers of the genus Brachyphyllum . Nereites and Planulites are tracks and burrows of worms , with or without marks of setæ , and some of the * The name Bilobites was originally proposed by De Kay for a bivalve shell ...
Pagina 30
... branch- ing burrows of worms illustrated by Nathorst and the author . As- tropolithon , a singular radiating marking of the Canadian Cambri- an , * seems to be some- thing organic , but of what nature is uncer- tain ( Fig . 9 ) ...
... branch- ing burrows of worms illustrated by Nathorst and the author . As- tropolithon , a singular radiating marking of the Canadian Cambri- an , * seems to be some- thing organic , but of what nature is uncer- tain ( Fig . 9 ) ...
Pagina 36
... branches , which are divaricating and sometimes leaf - like , B. gracilis , from the contains some true Algæ . Hall's Siluro - Cambrian , is one of these . Similar plants , referred to the same species , occur in the Clinton and Niagara ...
... branches , which are divaricating and sometimes leaf - like , B. gracilis , from the contains some true Algæ . Hall's Siluro - Cambrian , is one of these . Similar plants , referred to the same species , occur in the Clinton and Niagara ...
Pagina 39
... branch or stem of the Erian land - plant known as Arthro- stigma . In like manner , Haliserites Dechenianus , of Goeppert ... branches of Berwynia . These curious plants should be re - examined . shales and limestones of the Silurian owe ...
... branch or stem of the Erian land - plant known as Arthro- stigma . In like manner , Haliserites Dechenianus , of Goeppert ... branches of Berwynia . These curious plants should be re - examined . shales and limestones of the Silurian owe ...
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Termeni și expresii frecvente
abundant Acrogens aërial roots Algæ allied America animal appear arctic areoles bark beds belong bituminous branches Brongniart Calamites Canada carbon Carboniferous Caulopteris cellular character clay climate coal coal-formation conifers Cordaites cycads Dadoxylon Dawson deposits described Devonian diameter dicotyledonous Eocene Europe exogenous fact ferns flora formation forms fossil fossil plants fronds fructification fruit Gaspé genera genus Geological Society graphite Greenland gymnospermous Heer hemisphere Journal known land land-plants Laramie Laurentian leaf-bases leaf-scars leaves Lepidodendron Lepidophloios Lesquereux limestone Lower Carboniferous Lycopods macrospores matter medullary rays Mesozoic Miocene modern Nematophyton northern Nova Scotia occur outer Palæozoic period Permian pines pinnules pith present preserved probably Prof Psilophyton referred remarkable resemble Rhizocarps rocks sandstones scalariform scars Sequoia shales Sigillaria Silurian similar species specimens Sphenophyllum Sporangites spore-cases spores sporocarps stems Sternbergia structure surface Tertiary thick tion tissue tree-ferns trees trunks types Upper Cretaceous vascular vegetable wood woody