. Bulletin of the British Museum (Natural History). THE CARBONIFEROUS PTERIDOSPERM FROND NEUROPTERIS HETEROPHYIAA (BRONGNIART) STERNBERG 155. Fig. 1 Neuroptcris heterophylla. Basal part of frond, showing dichotomy of primary rachis. photographed with crosscd-poUir filters. , X Vy. See also Fig. 26. secondary pinnae are attached at 60°-70° at c. 6 cm intervals on the right side of the specimen, but there is little evidence of secondary pinnae on the other side except for one short stump of secondary rachis. Short monopinnatc pinnae are intercalated between the secondary pinnae
. Bulletin of the British Museum (Natural History). THE CARBONIFEROUS PTERIDOSPERM FROND NEUROPTERIS HETEROPHYIAA (BRONGNIART) STERNBERG 155. Fig. 1 Neuroptcris heterophylla. Basal part of frond, showing dichotomy of primary rachis. photographed with crosscd-poUir filters. , X Vy. See also Fig. 26. secondary pinnae are attached at 60°-70° at c. 6 cm intervals on the right side of the specimen, but there is little evidence of secondary pinnae on the other side except for one short stump of secondary rachis. Short monopinnatc pinnae are intercalated between the secondary pinnae, spaced at inter- vals of 1 â 5-2-0 cm. (In the middle of the specimen is a detached pinna of Neuroptcris semircticithita Josten, uncon- nected with the /V. helerophylla frond fragment.) If this was. 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 British Museum (Natural History). London : BM(NH)
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