. Annals of the Carnegie Museum. Carnegie Museum; Carnegie Museum of Natural History; Natural history. 6 7 Fig. 6. Rafinesquina champlainensis Raynioncl. A pedicle valve. Natura size. Fig. 7. The same species. A specimen showing the Lracliial valve, the cardiiia area, and the deltidium. Natural size. Fig. 8. The same species. Outline profile of a specimen cut along the median line, showing the curvature of both valves. Description. Shell large, ventricose, almost hemispheric. Length and width nearly equal. Hinge line usually a little longer than the width below, and the cardinal extremities ar
. Annals of the Carnegie Museum. Carnegie Museum; Carnegie Museum of Natural History; Natural history. 6 7 Fig. 6. Rafinesquina champlainensis Raynioncl. A pedicle valve. Natura size. Fig. 7. The same species. A specimen showing the Lracliial valve, the cardiiia area, and the deltidium. Natural size. Fig. 8. The same species. Outline profile of a specimen cut along the median line, showing the curvature of both valves. Description. Shell large, ventricose, almost hemispheric. Length and width nearly equal. Hinge line usually a little longer than the width below, and the cardinal extremities are produced into broad rounded ears. The pedicle valve is strongly and evcnh- convex, the highest point being about the middle of the \alvc. The brachial valve is flat on the umbo and concave in front, following the cur- vature of the opposite valve. Cardinal area on the pedicle valve rather wide. Delth\ rium covered by a broad con\ex deltidium. Area of brachial valve linear. The surface is marked by very numerous fine radiating stride, every. Fig 9. Rafinesquina cham- plainensis Raymond. The im- pression of a brachial valve. Natural Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Carnegie Museum; Carnegie Museum of Natural History. [Pittsburgh] : Published by authority of the Board of Trustees of the Carnegie Institute
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Keywords: ., booka, bookcentury1900, bookdecade1910, booksubjectnaturalhistory
