. Fossil plants : for students of botany and geology . Paleobotany. XXXIX] CTBNIS 583 Ctenis latifoKa (Brongniart). This species^, originally referred to Taeniopteris, was trans- ferred to Ctenis as the result of the discovery of anastomosing veins in the type-specimen in the Oxford Museum. The segments are shorter and broader than in C. sulcicauUs and very similar to those of C. orovillensis Fig. 62f). C'lenis mdcicaulis. (British Museum, V. 9012.) Ctenis sp. The pinna shown in fig. 624 from the Jurassic beds in York- shire ^ is interesting as one of the few examples of the preservatio
. Fossil plants : for students of botany and geology . Paleobotany. XXXIX] CTBNIS 583 Ctenis latifoKa (Brongniart). This species^, originally referred to Taeniopteris, was trans- ferred to Ctenis as the result of the discovery of anastomosing veins in the type-specimen in the Oxford Museum. The segments are shorter and broader than in C. sulcicauUs and very similar to those of C. orovillensis Fig. 62f). C'lenis mdcicaulis. (British Museum, V. 9012.) Ctenis sp. The pinna shown in fig. 624 from the Jurassic beds in York- shire ^ is interesting as one of the few examples of the preservation of the cuticular membrane. The straight or curved walls of the epidermal cells agree with those of recent Cycads except Stangeria, and each cell bears a large central papilla that gives to the lamina the finely punctate appearance which has been regarded as evidence of sporangia. The gaps in the cuticle probably mark the position of sunken stomata. 1 Seward (04) B. p. 115. ^ Hid- (00) p. 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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