Annals of the South African Museum, Volume 22South African Museum, 1928 - Natual history |
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Page 31
... convex ( imperfectly known ) ; the lower plates ornamented with fine , horizontal , closely - set , parallel , laminated lines . Stem slender , cylindrical , about one and a half times the length of theca , composed of a double ...
... convex ( imperfectly known ) ; the lower plates ornamented with fine , horizontal , closely - set , parallel , laminated lines . Stem slender , cylindrical , about one and a half times the length of theca , composed of a double ...
Page 32
... convex from side to side , the long , straight , lateral edges being parallel , and the lower edges slightly concave and meeting at an obtuse angle ; the upper end is not perfect , but shows two sets of 16-20 short parallel slits ...
... convex from side to side , the long , straight , lateral edges being parallel , and the lower edges slightly concave and meeting at an obtuse angle ; the upper end is not perfect , but shows two sets of 16-20 short parallel slits ...
Page 36
... convex and also descends steeply , but less so than the posterior face . The shell is ornamented with regular equidistant sharp raised concentric lines which have fine concentric striae in the concave interspaces between them . The ...
... convex and also descends steeply , but less so than the posterior face . The shell is ornamented with regular equidistant sharp raised concentric lines which have fine concentric striae in the concave interspaces between them . The ...
Page 38
... convex or concavo - convex ; cardinal angles rounded ; hinge - line short , about half width of shell . Pedicle valve gently convex ; beak small , elevated , with lateral edges inclined at about 120 ° ; hinge - area triangular , of ...
... convex or concavo - convex ; cardinal angles rounded ; hinge - line short , about half width of shell . Pedicle valve gently convex ; beak small , elevated , with lateral edges inclined at about 120 ° ; hinge - area triangular , of ...
Page 46
... convex , and it is rather inflated in the antero - posterior direction . The beak is small , pointed , and incurved . The teeth are short and stout ; the diductor muscle - scars are large and subcircular , more than half the length of ...
... convex , and it is rather inflated in the antero - posterior direction . The beak is small , pointed , and incurved . The teeth are short and stout ; the diductor muscle - scars are large and subcircular , more than half the length of ...
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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