Annals of the South African Museum, Volume 22South African Museum, 1928 - Natual history |
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Page 36
... curves slightly back and descends steeply in a gentle concave curve ; the anterior slope is gently arched and convex and also descends steeply , but less so than the posterior face . The shell is ornamented with regular equidistant ...
... curves slightly back and descends steeply in a gentle concave curve ; the anterior slope is gently arched and convex and also descends steeply , but less so than the posterior face . The shell is ornamented with regular equidistant ...
Page 53
... curve ; hinge - line 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 ...
... curve ; hinge - line 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 ...
Page 77
... curve , " and he considers that my P. subantiqua has rather close affinities with it . But the elongate form of Clarke's species ( op . cit . , fig . 14 ) is more like P. arcuata Schwarz , as above noticed . The shell which I compared ...
... curve , " and he considers that my P. subantiqua has rather close affinities with it . But the elongate form of Clarke's species ( op . cit . , fig . 14 ) is more like P. arcuata Schwarz , as above noticed . The shell which I compared ...
Page 79
... curve bending up rather suddenly at each end ; anterior end rather blunter and more subtruncate than posterior end . Pre- umbonal lunule short , lanceolate , not extending more than half the length of preumbonal hinge - line ...
... curve bending up rather suddenly at each end ; anterior end rather blunter and more subtruncate than posterior end . Pre- umbonal lunule short , lanceolate , not extending more than half the length of preumbonal hinge - line ...
Page 99
... curves round sharply at the narrower posterior angle ; the posterior margin is subtruncate and nearly straight ... curve ; posterior margin nearly straight , obliquely truncated , meeting the inferior margin at the posterior angle ...
... curves round sharply at the narrower posterior angle ; the posterior margin is subtruncate and nearly straight ... curve ; posterior margin nearly straight , obliquely truncated , meeting the inferior margin at the posterior angle ...
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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