Annals of the South African Museum, Volume 22South African Museum, 1928 - Natual history |
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Page 2
... seen to be narrower than the pith cells , and have a dense black inclusion of carbonaceous ( ? ) material in the centre of the lumen . The crushing action has effected a separation of the pith into two portions , but judging by the size ...
... seen to be narrower than the pith cells , and have a dense black inclusion of carbonaceous ( ? ) material in the centre of the lumen . The crushing action has effected a separation of the pith into two portions , but judging by the size ...
Page 3
... seen in longitudinal section to have spiral and then reticulate thickening , and finally multiseriate bordered pits ( Pl . I , fig . 2 ) . The innermost spirally thickened elements are protoxylems . In some sections it was possible to ...
... seen in longitudinal section to have spiral and then reticulate thickening , and finally multiseriate bordered pits ( Pl . I , fig . 2 ) . The innermost spirally thickened elements are protoxylems . In some sections it was possible to ...
Page 4
... seen between some of the groups of pits . These marks are , I think , due to partial disorganisation of the tracheid wall , and cannot be interpreted as true rims , for they are not seen in the best preserved specimens . Xylem ...
... seen between some of the groups of pits . These marks are , I think , due to partial disorganisation of the tracheid wall , and cannot be interpreted as true rims , for they are not seen in the best preserved specimens . Xylem ...
Page 6
... seen sections of the latter which in a fossilised condition would be distinguished only with difficulty from D. arberi . In the Araucarineae , however , the pits are not so fre- quently distant or oppositely placed . The pitting in the ...
... seen sections of the latter which in a fossilised condition would be distinguished only with difficulty from D. arberi . In the Araucarineae , however , the pits are not so fre- quently distant or oppositely placed . The pitting in the ...
Page 8
... seen to consist of spiral or scalariform elements . The curious cracks in Antarcticoxylon were at once recalled , and a careful comparison brought out many points of similarity . In Rhexoxylon tetrapteridoides there are large secondary ...
... seen to consist of spiral or scalariform elements . The curious cracks in Antarcticoxylon were at once recalled , and a careful comparison brought out many points of similarity . In Rhexoxylon tetrapteridoides there are large secondary ...
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Common terms and phrases
Anchiopella axial axis Baini Beil belong Bolivia bone Brit Calmonia Cape Univ capensis Ceres characters Chonetes Cladophlebis Clarke Conularia convex Cryphaeus Dalmanites described devon Devonian figs figured Flora Foss fossil frond frontal genal angles genus Geol Ginkgoites glabella granules head-shield Herscheli Homalonotus Ibid internal cast Knod Kozlowski lateral furrows length margin median Modiomorpha Molteno Molteno Beds Neues Jahrb Nuculites oblique Orbiculoidea Palaeoneilo Paléont Parana Phacops pinnae pinnules pits Plate pleurae pleural lobes posterior preserved Pseudoctenis Pterophyllum pygidium rachis radial Reed Rensselaeria resemblance Rhaetic Rhexoxylon Rhinesuchus ribs ring rounded S.A. Mus Salter Sandstone Schwarz secondary wood segments Seward shell side skull slightly South African Museum species specimen spines Spirifer surface Surv suture Taeniopteris TEXT-FIG Thinnfeldia thorax tracheids transverse tubercles Ulrich Upper valve veins venation Walkom width Williams and Breger XXII York State Mus Zeiller