. Fossil plants : for students of botany and geology . Paleobotany. 226 THALLOPHTTA. [CH. they may at least be mentioned as possible but not certain Palaeozoic forms of Ghara or an allied d e Fig. 46. a. Chara Bleicheri Sa,Tp. x30. 6 and c. Devonian CAara ? sp. circa X 12. d and e. Chara Wrighti Forbes, circa x 12. 1. Chara Bleicheri, Saporta. Fig. 46, a. In this form the ' fruits' are minute and subspherical, "39â"44 mm. long, and â¢â 35â"40 mm. broad, showing in side view 5â6 slightly oblique spiral bands. Each spiral band bears a row of slightly project- ing tubercles
. Fossil plants : for students of botany and geology . Paleobotany. 226 THALLOPHTTA. [CH. they may at least be mentioned as possible but not certain Palaeozoic forms of Ghara or an allied d e Fig. 46. a. Chara Bleicheri Sa,Tp. x30. 6 and c. Devonian CAara ? sp. circa X 12. d and e. Chara Wrighti Forbes, circa x 12. 1. Chara Bleicheri, Saporta. Fig. 46, a. In this form the ' fruits' are minute and subspherical, "39â"44 mm. long, and â¢â 35â"40 mm. broad, showing in side view 5â6 slightly oblique spiral bands. Each spiral band bears a row of slightly project- ing tubercles. This species was first described by Saporta^ from the Oxfordian (Jurassic) rocks of the Department of Lot in France; it is compared by the author of the species with Chara Jaccardi Heer, described by Heer from the Upper Jurassic rocks of Switzerland. 2. C. Knowltoni, Seward. Fig. 45, a and b, and Fig. 47. The Oogonia are broadly oval, about "5 mm. in length, and at the broadest part of about the same breadth. The surface is marked by eleven or twelve bands in the form of a flattened spiral. The stems possess investing cortical cells. This species was founded on specimens from the Wealden beds of Sussex^, but numerous examples of Chara ' fruits' and stems have long been known from the uppermost Jurassic rocks of the Dorset coast and the Isle of Wight, which may probably be included in this species. These fossil Charas are 1 Saporta (73) p. 214, PI. ix. figs. 8-11. 2 Seward (94=) p. 13, fig. 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 Seward, A. C. (Albert Charles), 1863-1941. Cambridge : University Press
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