Annals of the South African Museum, Volume 22South African Museum, 1928 - Natual history |
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Page 20
... margin of the pore ; and in Torreya sp . , in some sections examined the arrangement is even more complicated , for the bands are sometimes in pairs , and one member of the pair may be thinner than the other , and may terminate at the ...
... margin of the pore ; and in Torreya sp . , in some sections examined the arrangement is even more complicated , for the bands are sometimes in pairs , and one member of the pair may be thinner than the other , and may terminate at the ...
Page 43
... margin , with one stronger median radius . Pedicle valve with short thin median septum , and pair of short broadly flabelliform rounded diductors about one - fourth the length of the valve ; interior covered with radial lines of small ...
... margin , with one stronger median radius . Pedicle valve with short thin median septum , and pair of short broadly flabelliform rounded diductors about one - fourth the length of the valve ; interior covered with radial lines of small ...
Page 46
... margin by intercalation ( and bifurcation ? ) , and on the cast lines of small equidistant punctae lie between them . The hinge - line does not show any distinct cardinal spines , and there are only doubtful traces of fine crenulations ...
... margin by intercalation ( and bifurcation ? ) , and on the cast lines of small equidistant punctae lie between them . The hinge - line does not show any distinct cardinal spines , and there are only doubtful traces of fine crenulations ...
Page 49
... margin . The much - extended transverse alate typical form of Sp . antarcticus with acutely pointed lateral angles is easily distinguishable from this variety when we have well - preserved specimens to deal with . One of the specimens ...
... margin . The much - extended transverse alate typical form of Sp . antarcticus with acutely pointed lateral angles is easily distinguishable from this variety when we have well - preserved specimens to deal with . One of the specimens ...
Page 66
South African Museum. lateral margins ; the centre of the valve is occupied by a group of 4 equally strong , angular , straight ribs , extending from the beak to the margin , and forming a flattened low fold which is only definitely ...
South African Museum. lateral margins ; the centre of the valve is occupied by a group of 4 equally strong , angular , straight ribs , extending from the beak to the margin , and forming a flattened low fold which is only definitely ...
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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