. Fossil plants : for students of botany and geology . Paleobotany. XXVIl] CTENOPTERIS 549 Frond bipinnate, broad rachis giving ofF branches at an acute angle; pinnules broadly linear, slightly falcate, with several slightly divergent forked veins. A frond very similar to the Lower Lias specimen from Dorsetshire represented in fig. 362 was described by Leckenby as Ctenis Leckenhyi (Bean MS.) from the Inferior Oolite of Yorkshire'- Leckenby recognised the possibility of a Cycadean. Fiu. 362. Ctenopteris eyeadea, Brongn. (^ nat. size.) From a specimen in the British Museum. [] affinity, but
. Fossil plants : for students of botany and geology . Paleobotany. XXVIl] CTENOPTERIS 549 Frond bipinnate, broad rachis giving ofF branches at an acute angle; pinnules broadly linear, slightly falcate, with several slightly divergent forked veins. A frond very similar to the Lower Lias specimen from Dorsetshire represented in fig. 362 was described by Leckenby as Ctenis Leckenhyi (Bean MS.) from the Inferior Oolite of Yorkshire'- Leckenby recognised the possibility of a Cycadean. Fiu. 362. Ctenopteris eyeadea, Brongn. (^ nat. size.) From a specimen in the British Museum. [] affinity, but regarded the bipinnate habit as an objection. The branched fronds of the Australian Cycad Bowenia supply an answer to this objection. Several good examples of Ctenopteris cycadea are figured by Schenk^ from Ehaetic rocks of Persia. Zeiller's Tonkin Rhaetic species, G. Sarrani', affords a striking illustration of the difficulty of drawing a clear line of separation between Ctenopteris and some species of Thinnfeldia. 1 Leckenby (64) A. PI. x. fig. 1; Seward (04) p. 36. 2 Sohenk (87). ' Zeiller (03) Pis. vi.— 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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