Extinct plants and problems of evolution : founded on a course of public lectures delivered at the University college of Wales, Aberystwyth, in 1922 / by Dukinfield Henry Scott ; with 63 figures and a frontispiece.

  • Scott, Dukinfield Henry, 1854-1934.
Date:
1924
Catalogue details

Licence: In copyright

Credit: Extinct plants and problems of evolution : founded on a course of public lectures delivered at the University college of Wales, Aberystwyth, in 1922 / by Dukinfield Henry Scott ; with 63 figures and a frontispiece. Source: Wellcome Collection.

    17/264
    CONTENTS CHAP. T. INTRODUCTORY. SOME CURRENT PROBLEMS OF EVOLU- TION. POSITION OF DARWINISM. BEARING OF FOSSIL BOTANY ON THE QUESTIONS AT ISSUE II. THE RECENT FLORA. THE VEGETATION OF THE TERTIARY PERIOD. THE CRETACEOUS TRANSFORMATION. THE OLDEST KNOWN FLOWERING PLANTS III. THE FLORAS OF THE MESOZOIC AGE. THE CYCADS : THEIR SIGNIFICANCE AND GEOLOGICAL HISTORY. THE MESOZOIC CYCADOPIIYTES A VARIED AND DOMINANT CLASS. ANALOGIES WITH THE FLOWER- ING PLANTS ....... IV. THE PERMIAN TRANSFORMATION. THE CARBONIFEROUS FLORA IN RELATION TO THAT OF THE MESOZOIC AGE. PROFOUND CHANGES. EXTINCT GROUPS. THE “ SEED FERNS ” AND THE TRUE FERNS V. LYCOPODS, HORSETAILS AND SPIIENOPHYLLS. THE LOWER CARBONIFEROUS FLORA. EXTINCT FAMILIES. ABSENCE OF SOME FAMILIAR TYPES. THE UPPER DEVONIAN FLORA. HIGH ORGANISATION OF THESE ANCIENT PLANTS ...... VI. THE EARLY DEVONIAN, THE AGE OF THE OLDEST KNOWN LAND FLORA. PLANTS FOR THE MOST PART SIMPLE, BUT HIGHER TYPES PRESENT ALSO. THE RIIYNIE DISCOVERIES ; STRANGE AND SIMPLE PLANTS, NOT REFERABLE TO ANY EXISTING CLASS. THE QUESTION OF THE ORIGINAL TRANSMIGRATION FROM SEA TO LAND BEARING OF EVIDENCE FROM FOSSIL PLANTS ON EVOLUTIONARY PROBLEMS ..... REFERENCES ........ INDEX rAGE ] 32 58 103 144 181 228 233