. Studies in fossil botany . Paleobotany. 234 STUDIES IN FOSSIL BOTANY Lycopodiaceae. Mr. Kidston, in his memoir above cited, has made further important additions to our knowledge of these strobili, for in certain new forms of Sigillariostrobus, which he has described, from the Coal-measures of York- shire, he has been able to demonstrate the form and position of the spor- angia, and to obtain at least indications of the presence of microspores in some of them. The sporangia were observed in longitudinal section on the fractured surface of a specimen which had been split down the middle ; for
. Studies in fossil botany . Paleobotany. 234 STUDIES IN FOSSIL BOTANY Lycopodiaceae. Mr. Kidston, in his memoir above cited, has made further important additions to our knowledge of these strobili, for in certain new forms of Sigillariostrobus, which he has described, from the Coal-measures of York- shire, he has been able to demonstrate the form and position of the spor- angia, and to obtain at least indications of the presence of microspores in some of them. The sporangia were observed in longitudinal section on the fractured surface of a specimen which had been split down the middle ; for it must be remem- bered that in no case has an undoubted cone of Sigillaria been found with the tissues actually petrified. The sporangia prove to have been oval bodies with their long axis directed radially, and were seated each on the horizontal pedicel of the sporophyll, to which the sporangium was to all appearance attached along the whole of its lower surface (Fig. 96, B). The sporangial membrane also appears, so far as the state of preserva- tion allows us to judge, to have been continuous with. Fig. 96.—A. Sigillariostrobus rhombibract- catus, Kidston. Part of cone, showing the pedicel (/) with sterile bracts, sp, sporophylls; axt axis exposed, showing scars of sporophylls. $ nat. size. B and C. 6\ ciliaius, Kidston. B. Part of axis (ax) with sporophylls (sp) and megaspor- angia (sm) seen in radial fracture. X 3. C. Echinulate megaspores. * about 7. All after Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Scott, Dukinfield Henry, 1854-1934. London, A. and C. Black
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