Annals of the South African Museum, Volume 22South African Museum, 1928 - Natual history |
From inside the book
Results 6-10 of 70
Page 53
... convex ; beak swollen , broad , incurved , pointed ; median sinus narrow , scarcely wider than interpleural grooves ; lateral lobes bearing 4-5 strong , simple , angular , or subangular prominent ribs on each side , of equal strength ...
... convex ; beak swollen , broad , incurved , pointed ; median sinus narrow , scarcely wider than interpleural grooves ; lateral lobes bearing 4-5 strong , simple , angular , or subangular prominent ribs on each side , of equal strength ...
Page 54
... convex , with weak longitudinal median sulcus ; beak low , rounded , obtuse , incurved , with rounded umbonal shoulders . Brachial valve convex , with short median internal septum about one - third the length of the valve . Surface of ...
... convex , with weak longitudinal median sulcus ; beak low , rounded , obtuse , incurved , with rounded umbonal shoulders . Brachial valve convex , with short median internal septum about one - third the length of the valve . Surface of ...
Page 57
... 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 on each side , successively decreasing in prominence and strength ...
... 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 on each side , successively decreasing in prominence and strength ...
Page 64
... convex to bi - convex , subcircular . Pedicle valve moderately convex , subcarinate ; beak moderate , pointed , incurved ; surface of valve covered with 16-20 low , rounded , simple ribs , 8-10 being placed on each side of a narrow ...
... convex to bi - convex , subcircular . Pedicle valve moderately convex , subcarinate ; beak moderate , pointed , incurved ; surface of valve covered with 16-20 low , rounded , simple ribs , 8-10 being placed on each side of a narrow ...
Page 66
... convex , with prominent , pointed , slightly incurved beak , the umbonal edges straight , extending nearly half the length of the shell , diverging at about 80 ° -90 ° . Surface of valve ornamented with about 18 straight , simple ...
... convex , with prominent , pointed , slightly incurved beak , the umbonal edges straight , extending nearly half the length of the shell , diverging at about 80 ° -90 ° . Surface of valve ornamented with about 18 straight , simple ...
Other editions - View all
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