Annals of the South African Museum, Volume 4The Museum - Natural history |
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Page 54
shorter pinnules the lamina is traversed by several slightly diverging veins which spring separately from the rachis , but as the pinnules become larger the veins tend to converge in the basal portion of the lamina , forming a midrib ...
shorter pinnules the lamina is traversed by several slightly diverging veins which spring separately from the rachis , but as the pinnules become larger the veins tend to converge in the basal portion of the lamina , forming a midrib ...
Page 58
... Pinnules linear , entire or serrate , becoming more crowded in the distal region of the pinnæ and near the apex of the frond , confluent basally ; the rachis bears pinnules that extend upward on to the lower side of the pinnæ . Venation ...
... Pinnules linear , entire or serrate , becoming more crowded in the distal region of the pinnæ and near the apex of the frond , confluent basally ; the rachis bears pinnules that extend upward on to the lower side of the pinnæ . Venation ...
Page 59
... pinnules are for the most part entire , but on the lower pinnæ some show a distinct serrate margin ( fig . 6a ) . In the apical region the pinnules are more crowded and gradually pass into segments with a serrate margin . The venation ...
... pinnules are for the most part entire , but on the lower pinnæ some show a distinct serrate margin ( fig . 6a ) . In the apical region the pinnules are more crowded and gradually pass into segments with a serrate margin . The venation ...
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Common terms and phrases
angles Anomodonts axis baini beak beds Bokkeveld bone Brachial valve Brachiopoda British Museum Brongn browniana canine Carruthers Ceres Chonetes Cladophlebis closely described Devonian elongata Feistmantel fern figured flabellites Flora fossil fragments frond furrows Gamka Poort genus Geol Geological glabella Glossopteris grooves Gydo Pass humerus Ibid identical imperfect internal cast Journ Jurassic lamina leaf lobes lower Lystrosaurus margin maxillary median midrib Morris and Sharpe Nathorst Neuropteridium numerous odontopteroides orbignyi Palæont palate Pareiasaurus Pecopteris pedicle pedicle valve Phacops pinna pinnæ pinnules plant Plate portion posterior precoracoid preserved prevomers probably Proterosuchus pterygoid Quart rachis represented in pl resemblance Rhætic ribs rocks Salter Sandstone Saporta Schimper segments Seward shown in fig shows slightly South African species specimen Sphenopteris Spirifer Spirophyton stem Stormberg surface Taniopteris Tate teeth Theriodonts Thinnfeldia Titanosuchus type-specimen Typhloniscus Uitenhage Ulrich upper veins venation Vereeniging vertebræ viii vomer Wealden width Zamites Zeiller