Annals of the South African Museum, Volume 22South African Museum, 1928 - Natual history |
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Page 3
... placed pits are very charac- teristic , and when uniseriate the pits are more usually distant . The * Barber , 1898 . † In one the change is abrupt , and at this point is indistinguishable from an ordinary ring . The ring extends ...
... placed pits are very charac- teristic , and when uniseriate the pits are more usually distant . The * Barber , 1898 . † In one the change is abrupt , and at this point is indistinguishable from an ordinary ring . The ring extends ...
Page 6
... placed . The pitting in the field in Agathis is sometimes very like that of D. arberi ( Pl . I , fig . 5 ) . It . must be remembered that the walls of the ray cells are themselves unpitted in these two living genera . The nature of the ...
... placed . The pitting in the field in Agathis is sometimes very like that of D. arberi ( Pl . I , fig . 5 ) . It . must be remembered that the walls of the ray cells are themselves unpitted in these two living genera . The nature of the ...
Page 8
... placed numerous small secondary developments , which in favourable sections are seen to consist of spiral or scalariform elements . The curious cracks in Antarcticoxylon were at once recalled , and a careful comparison brought out many ...
... placed numerous small secondary developments , which in favourable sections are seen to consist of spiral or scalariform elements . The curious cracks in Antarcticoxylon were at once recalled , and a careful comparison brought out many ...
Page 12
... placed further out in relation to the central axis , and the bays formed in this way are filled with the centripetal xylem of the perimedullary ring . There seems to be definite evidence here that the centripetal ring is of an ...
... placed further out in relation to the central axis , and the bays formed in this way are filled with the centripetal xylem of the perimedullary ring . There seems to be definite evidence here that the centripetal ring is of an ...
Page 14
... placed pits are very rare , if present at all . Considerable lengths of tracheid wall without pits are found , but definite series of separate pits , such as occur in D. arberi , Sew . , seem to be almost completely absent ; the pits in ...
... placed pits are very rare , if present at all . Considerable lengths of tracheid wall without pits are found , but definite series of separate pits , such as occur in D. arberi , Sew . , seem to be almost completely absent ; the pits in ...
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Common terms and phrases
Anchiopella axial axis Baini Beil belong Bolivia bone Brit Calmonia Cape Univ Ceres characters Chonetes Cladophlebis Clarke Conularia convex Cryphaeus Dalmanites described devon Devonian Feist 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 Palaeoneilo Paléont Parana parasphenoid Phacops pinnae pinnules pits Plate pleurae pleural lobes posterior preserved Pseudoctenis Pterophyllum pterygoid pygidium rachis radial Reed Rensselaeria resemblance Rhaetic Rhexoxylon Rhinesuchus ribs ring rounded S.A. Mus Salter Sandstone Schwarz segments Seward shell side skull slightly South African Museum species specimen spines Spirifer surface Surv suture Taeniopteris Tapinocephalus TEXT-FIG Thinnfeldia thorax tracheids transverse tubercles Ulrich Upper valve veins venation Walkom width Williams and Breger XXII York State Mus Zeiller