Annals of the South African Museum, Volume 22South African Museum, 1928 - Natual history |
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Page 32
... 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 , representing the hydrospires , on each ...
... 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 , representing the hydrospires , on each ...
Page 53
... straight at greatest width of shell . Pedicle valve rather strongly convex ; beak swollen , broad , incurved , pointed ; median sinus narrow , scarcely wider than interpleural grooves ; lateral lobes bearing 4-5 strong , simple ...
... straight at greatest width of shell . Pedicle valve rather strongly convex ; beak swollen , broad , incurved , pointed ; median sinus narrow , scarcely wider than interpleural grooves ; lateral lobes bearing 4-5 strong , simple ...
Page 57
... straight , slightly less than width of shell . Pedicle valve gently convex ; beak small , pointed , slightly elevated ; surface of valve . with a rather broader median rib and 4-6 nearly straight , simple , broad , low , subangular ribs ...
... straight , slightly less than width of shell . Pedicle valve gently convex ; beak small , pointed , slightly elevated ; surface of valve . with a rather broader median rib and 4-6 nearly straight , simple , broad , low , subangular ribs ...
Page 66
... straight , extending nearly half the length of the shell , diverging at about 80 ° -90 ° . Surface of valve ornamented with about 18 straight , simple , rounded , or slightly subangular ribs of equal size , separated by grooves of equal ...
... straight , extending nearly half the length of the shell , diverging at about 80 ° -90 ° . Surface of valve ornamented with about 18 straight , simple , rounded , or slightly subangular ribs of equal size , separated by grooves of equal ...
Page 72
... straight , with a series of 20-25 postumbonal very small transverse teeth reaching * Clarke , op . cit . , 1913 , p . 179 . † Kozlowski , Ann . Paléont . , vol . xii , 1923 , p . 78 , pl . viii , figs . 1 , la , 2–4 . about three ...
... straight , with a series of 20-25 postumbonal very small transverse teeth reaching * Clarke , op . cit . , 1913 , p . 179 . † Kozlowski , Ann . Paléont . , vol . xii , 1923 , p . 78 , pl . viii , figs . 1 , la , 2–4 . about three ...
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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