Art-studies from nature, as applied to design : for the use of architects, designers, and manufacturers . Fig. 20. venations. It must be remembered that our drawing only repre-sents one of the fronds. The grouping of the whole on the straightand slender stem is very beautiful. The Pecopteris Whitbiensis (Fig. 21), which presents many D D 202 ART-STUDIES FROM NATURE. differences from the other forms, is copied from a specimen foundin a nodule of argillaceous ironstone from the lower shale atCloughton, and certainly it presents many points of interest. Among the most remarkable and characteristi
Art-studies from nature, as applied to design : for the use of architects, designers, and manufacturers . Fig. 20. venations. It must be remembered that our drawing only repre-sents one of the fronds. The grouping of the whole on the straightand slender stem is very beautiful. The Pecopteris Whitbiensis (Fig. 21), which presents many D D 202 ART-STUDIES FROM NATURE. differences from the other forms, is copied from a specimen foundin a nodule of argillaceous ironstone from the lower shale atCloughton, and certainly it presents many points of interest. Among the most remarkable and characteristic plants of thecoal formation is the Stgillarza, of which extraordinary trailingplant upwards of sixty species have been Fig. 21. These plants are generally but a few feet in height, thoughsometimes two yards broad. Although of universal occurrence, it is singular that it isunaccompanied by any evidence of branches, leaves, flowers, orfruit. The peculiarly lax condition of this enormous tree fern hasprevented the preservation of many of the beautiful markings bywhich the trunk must have been distinguished. FORMS OF ORGANIC REMAINS. 203 In our selection from such as have been discovered we havegiven two striking varieties, the first the Sigillaria elegans (Fig. 22),as it is figured by Brongniart, and the Sigillaria Defrancii(Fig. 23) from St. Ambroise, both of them distinguished by thebeauty of their markings. It will be evident upon examinationthat these strange vegetable wonders of an early world bear arelation to the recent Coniferae; but this subject, which is one ofanxious dispute among fossil botanists, need not detain us. Amid
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