Proceedings of the Academy of Natural Sciences of Philadelphia, 28. köideAcademy of Natural Sciences of Philadelphia, 1876 "Publications of the Academy of Natural Sciences of Philadelphia": v. 53, 1901, p. 788-794. |
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Acad Academy acid angle antero-posterior aperture apex appear arranged band base beaks belong body whorl bone branches branchlets caudal cavities Centennial centre centrum character collection color concave convex Cretaceous crown crystals described diameter Difflugia distal end dorsal dorsal fin Eocene exhibited face fathoms flower fossils Gabb galactic genus Georgia gonangia Gonosome groove Hexagonite Hydrocaulus hydrothecæ I. V. Williamson Fund inch inner insects internodes Isaac Lea J. S. Phillips Jersey JOSEPH LEIDY Journ latter Leidy length Lituya Bay longitudinal margin median MEEHAN members present mineral nearly Nunivak Island oblique observed Pataula Creek pectoral fin plane plants plates portion posterior Proc Prof ribs rounded RUSCHENBERGER Semidi Islands shell Shumagin Islands side Society species specimens stars stem surface suture teeth THOMAS MEEHAN tion tooth transverse Trophosome Unalashka upper vertebræ vertical W. H. Dall width Wilson Fund
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Page 290 - Shell elongate, fusiform : whorls cancellated by longitudinal and revolving ribs. Columella with one very oblique fold, and sometimes one or more smaller secondary folds. In shape this genus is not unlike the two preceding genera, but it differs from them all in having essentially a single large oblique fold. When more than one occurs the secondary folds are smaller than the large primary.
Page 257 - Thus each bounding ridge terminates'abruptly at the fundus of one of the fossa?, while the other end of the fossa rises and contracts to another ridge. The result is precisely that seen in the interior sculpture of Saracenic domes or niches, and is one which is quite unique among tortoises. The direction of the ridges is at right angles to the costal dermal sutures. This species was about as large as the snapping tortoise (Chelydra serpentina).
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