Annals of the South African Museum, Volume 22South African Museum, 1928 - Natual history |
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Page 5
... distinct name . As the result of examining the types of Dadoxylon arberi , Sew . ( D. australe , Arber ) , I am convinced that it is impossible to separate the secondary wood of D. bakeri , Walton , * from wood of this type . The ...
... distinct name . As the result of examining the types of Dadoxylon arberi , Sew . ( D. australe , Arber ) , I am convinced that it is impossible to separate the secondary wood of D. bakeri , Walton , * from wood of this type . The ...
Page 8
... Distinct rings of growth are present . Large tangential splits in the secondary wood , with small strands included in them of spiral , thickened elements are an important feature . Large rays with " leaf traces " are present . The ...
... Distinct rings of growth are present . Large tangential splits in the secondary wood , with small strands included in them of spiral , thickened elements are an important feature . Large rays with " leaf traces " are present . The ...
Page 10
... distinct and widely separated sectors , such as are found in R. tetrapteridoides and R. africanum . There are various strands passing out radially in the cracks associated with the traces . The larger ones are probably the traces ...
... distinct and widely separated sectors , such as are found in R. tetrapteridoides and R. africanum . There are various strands passing out radially in the cracks associated with the traces . The larger ones are probably the traces ...
Page 12
... distinct characters to differentiate it clearly from the Dadoxylon form - group . White also has questioned its attribution to Dadoxylon . Trigonomyelon pedroi , Zeill . sp . , has three projections of the pith , each representing ...
... distinct characters to differentiate it clearly from the Dadoxylon form - group . White also has questioned its attribution to Dadoxylon . Trigonomyelon pedroi , Zeill . sp . , has three projections of the pith , each representing ...
Page 13
... distinct growth rings are present of the type common in stems , i.e. with a broad zone of the late type of element into which the preceding early type of wood gradually merges . The breadth of a ring varies from 3 to 12 mm . ( av . 5 ...
... distinct growth rings are present of the type common in stems , i.e. with a broad zone of the late type of element into which the preceding early type of wood gradually merges . The breadth of a ring varies from 3 to 12 mm . ( av . 5 ...
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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