. Annals of the Carnegie Museum. Carnegie Museum; Carnegie Museum of Natural History; Natural history. Raymond : Rkalhioi'oua and Osiracoda ok the Cha/v. 23.'> C'.enus Rakinesquina Hall and Clarke. 15. Rafinesquina champlainensis Ra\ nioiul. KiifuifSiiuiiui cliamp!iii>unsis , igoj. Bulltlin AincTiLaii I'lik'oiUology, HI. p. 373. PI. 18. figs. 5. 6. This large Rafinesquina is very abundant in the middle layers of the Chazy, and occupies the same place in the fauna of the Chazy that K. (iltcniata does in the Trenton. In general form it resembles R. (iltcniala, but is much more
. Annals of the Carnegie Museum. Carnegie Museum; Carnegie Museum of Natural History; Natural history. Raymond : Rkalhioi'oua and Osiracoda ok the Cha/v. 23.'> C'.enus Rakinesquina Hall and Clarke. 15. Rafinesquina champlainensis Ra\ nioiul. KiifuifSiiuiiui cliamp!iii>unsis , igoj. Bulltlin AincTiLaii I'lik'oiUology, HI. p. 373. PI. 18. figs. 5. 6. This large Rafinesquina is very abundant in the middle layers of the Chazy, and occupies the same place in the fauna of the Chazy that K. (iltcniata does in the Trenton. In general form it resembles R. (iltcniala, but is much more near!\- 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. 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
