Reports of the Princeton University Expeditions to Patagonia, 1896-1899; Palaeontology. PT. 1. the Marine Cretaceous Invertebrates

Reports of the Princeton University Expeditions to Patagonia, 1896-1899; Palaeontology. PT. 1. the Marine Cretaceous Invertebrates

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1901 edition. Excerpt: ... to which one of the numerous Tertiary Turbonillce the present species bears the closest resemblance. Fam. SCALARIIDAi Brod. Gen. SCALARIA Lmck. 107. Scalar1a Rugulosa Sowerby. Pl. XXXI, Fig. u.." 1846 S. rug. Sowerby, in: Darwin, Geol. Observ. S. Amer., p. 255, pl. 3. 42, 43. 1864 S. lyrata Zittel, No vara Exp. Geol., p. 41, pl. 9, f. 8. 1864 S. browni Zittel, ibid., p. 42, pl. 9, f. 9. 1873 S. browni & lyrata Hutton, Catal. Tert. Moll. Ech. N. Zealand, p. 9. 1885 S. browni & lyrata Hutton, in: Quart. Journ. Geol. Soc, v. 41, p. 550. 1887 S. rug. Philippi, Tert. & Quart. Verst. Chiles, p. 83, pl. 9, f. 15. 1897 S. rug. v. Ihering, in: Rev. Mus. Paul., v. 2, p. 277. Shell large, solid, conical, elongate, not perforated. Whorls convex, with longitudinal ribs and spiral striae. Suture deep. Longitudinal ribs subequal, high, variciform, moderately thick in the young shell, very thick and swollen in the old, the anterior side (directed toward the mouth) is rounded, the posterior excavated, with a sharp edge. The number of ribs varies from 8 to 16 in different individuals, and even in one and the same individual the number sometimes varies considerably (for instance from 10 to 16 in a large one from San Julian); other individuals preserve the number throughout (so a large one from San Julian with 8 ribs on all whorls). In young individuals, where the longitudinal ribs are thinner, they often show, on the upper part, near the suture, a small point or angle. Ribs and intervals crossed by revolving striae, which are more or less distinct (when indistinct, probably worn off). Base of shell with a spiral carina interrupted by the longitudinal ribs. Mouth almost circular, lip reflected. Measurements: Almost complete individual: height, 52...show more

Product details

  • Paperback | 126 pages
  • 189 x 246 x 7mm | 240g
  • Rarebooksclub.com
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236548868
  • 9781236548863