The Geological History of PlantsD. Appleton & Company, 1892 - 294 pagini |
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Pagina 25
... Erian Flora of Canada , " 1871 and 1882 , for full description of these fossils . + " American Journal of Science , " 1878 . gard the supposed stigmaria - like roots as really stems LAURENTIAN AND EARLY PALEOZOIC . 25.
... Erian Flora of Canada , " 1871 and 1882 , for full description of these fossils . + " American Journal of Science , " 1878 . gard the supposed stigmaria - like roots as really stems LAURENTIAN AND EARLY PALEOZOIC . 25.
Pagina 26
Sir John William Dawson. gard the supposed stigmaria - like roots as really stems , and the supposed rootlets as short , spine - like rudiment- ary leaves . All such comparisons must , however , in the mean time be regarded as ...
Sir John William Dawson. gard the supposed stigmaria - like roots as really stems , and the supposed rootlets as short , spine - like rudiment- ary leaves . All such comparisons must , however , in the mean time be regarded as ...
Pagina 28
... Nova Scotia , to illustrate supposed Algæ . Climactichnites , from the same beds which afford Pro- tichnites. * " Canadian Naturalist , " vol . vii . FIG . 8. - Palæophycus Beverlyensis ( Bill- ings ). 28 THE GEOLOGICAL HISTORY OF PLANTS .
... Nova Scotia , to illustrate supposed Algæ . Climactichnites , from the same beds which afford Pro- tichnites. * " Canadian Naturalist , " vol . vii . FIG . 8. - Palæophycus Beverlyensis ( Bill- ings ). 28 THE GEOLOGICAL HISTORY OF PLANTS .
Pagina 29
... supposed Algae was an error , but this is of the less consequence , as these are not true plants but only animal trails . markings referred to Palæochorda , Palæophycus , and Scolithus have. LAURENTIAN AND EARLY PALEOZOIC . 29.
... supposed Algae was an error , but this is of the less consequence , as these are not true plants but only animal trails . markings referred to Palæochorda , Palæophycus , and Scolithus have. LAURENTIAN AND EARLY PALEOZOIC . 29.
Pagina 30
... confirmed this conclusion by. FIG . 8. - Palæophycus Beverlyensis ( Bill- ings ) , a supposed Cambrian Fucoid , but probably an animal trail . FIG . 9. Astropolithon Hindii , an organism of the. 30 THE GEOLOGICAL HISTORY OF PLANTS .
... confirmed this conclusion by. FIG . 8. - Palæophycus Beverlyensis ( Bill- ings ) , a supposed Cambrian Fucoid , but probably an animal trail . FIG . 9. Astropolithon Hindii , an organism of the. 30 THE GEOLOGICAL HISTORY OF PLANTS .
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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