Annals of the South African Museum, Volume 22South African Museum, 1928 - Natual history |
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Page 53
... lobes bearing 4-5 strong , simple , angular , or subangular prominent ribs on each side , of equal strength , straight or slightly curved back , separated by equally strong and wide angular or subangular grooves . Surface of shell ...
... lobes bearing 4-5 strong , simple , angular , or subangular prominent ribs on each side , of equal strength , straight or slightly curved back , separated by equally strong and wide angular or subangular grooves . Surface of shell ...
Page 66
... lobes of the shell , but the 5th rib is weak and the 6th nearly obsolete . A median septum extends internally for half the length of the valve , arising from the hinge - plate where there is also a peculiar cardinal process ( not well ...
... lobes of the shell , but the 5th rib is weak and the 6th nearly obsolete . A median septum extends internally for half the length of the valve , arising from the hinge - plate where there is also a peculiar cardinal process ( not well ...
Page 113
... lobe on the back . The revolving lines which ornament the exterior , as Clarke shows in his figures of specimens from Ponta Grossa , are preserved in some of the examples from the Bokkeveld Beds of Gydo Pass ( 213 ) in the South African ...
... lobe on the back . The revolving lines which ornament the exterior , as Clarke shows in his figures of specimens from Ponta Grossa , are preserved in some of the examples from the Bokkeveld Beds of Gydo Pass ( 213 ) in the South African ...
Page 120
... lobes , which are larger than the others , and triangular in shape , with their base equal to one - third the width of the glabella . The glabella is sub- urceolate , very broad and short , widening rather rapidly towards the base ...
... lobes , which are larger than the others , and triangular in shape , with their base equal to one - third the width of the glabella . The glabella is sub- urceolate , very broad and short , widening rather rapidly towards the base ...
Page 121
... lobes slightly convex , with half pleura on front margin having obtusely - angular , well - marked fulcrum at about half its width , and strong sharp furrow behind it ; rest of pleural lobes composed of 5 very flat low pleurae , of ...
... lobes slightly convex , with half pleura on front margin having obtusely - angular , well - marked fulcrum at about half its width , and strong sharp furrow behind it ; rest of pleural lobes composed of 5 very flat low pleurae , 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