Elements of geology, or, The Elements of geology, or, The ancient changes of the earth and its inhabitants as illustrated by geological monuments elementsofgeolog00lyel Year: 1868 428 FOSSIL PLANTS—LIAS. [dr. XXI. of these two divisions numerous remains of insects and plants have been detected in several places, mingled with marine shells. One band, rarely exceeding a foot in thickness, has been named the 'insectlime- stone.' It passes upwards into a shale containing Cypris and Estheria and is charged with the wing-cases of several genera of coleoptera, and with some nearly entire beetles, of
Elements of geology, or, The Elements of geology, or, The ancient changes of the earth and its inhabitants as illustrated by geological monuments elementsofgeolog00lyel Year: 1868 428 FOSSIL PLANTS—LIAS. [dr. XXI. of these two divisions numerous remains of insects and plants have been detected in several places, mingled with marine shells. One band, rarely exceeding a foot in thickness, has been named the 'insectlime- stone.' It passes upwards into a shale containing Cypris and Estheria and is charged with the wing-cases of several genera of coleoptera, and with some nearly entire beetles, of K& 46a which the eyes are preserved. The nervures of the wings of neuropterous insects (fig. 460) are beautifully perfect in this bed. Ferns, with cycads and leaves of monocotyledonous plants, and some apparently brackish and jb. Brodie.) in several places, while in others ma- rine shells predominate, the fossils varying apparently as we examine the bed nearer or further from the ancient land, or the source whence the freshwater was derived. There are two, or even three, bands of ' insect limestone ' in several sections, and they have been ascertained by Mr. Brodie to retain the same lithological and zoological characters when traced from the centre of Warwickshire to the borders of the southern part of 'Wales. After studying 300 specimens of these insects from the lias, Mr. Westwood declares that they comprise both wood-eating and herb-devouring beetles, of the Linnean genera Mater, Carabus, &c, besides grass- hoppers (Gryllus), and detached wings of dragon-flies and mayflies, or insects referable to the Linnean genera, Libellula, Ephemera, Hemero- bius, and Panorpa, in all belonging to no less than twenty-four families. The size of the species is usually small, and such as taken alone would imply a temperate climate; but many of the associated organic remains of other classes must lead to a different conclusion. Fossil plants.—Among the vegetable-remains of the Lias, sev
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