Palaeontographical Society Monographs Volume 53, Nos. 248-251

Palaeontographical Society Monographs Volume 53, Nos. 248-251

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1899 edition. Excerpt: ...i Lund Hancll., ' vol. viii (1897), p. 63. 4 'Verhandl. des naturhist. Vereines der preuss. Rheinl., &c., ' vol. xlii (1885), p. 93. 5 "Die Mollnsk. der Aachen. Kreide.," 'Palasontographica, ' vol. xxxv (1889), p. 210, pl. xxiii, figs. 11, 12; pl. xxiv, figs. 1--10. 5 ' Prodr. de Pal., ' vol. ii (1850), p. 196. 7 ' Die Verstein. von Kieslingswalda' (1843), p. 14, pl. ii, figs. 19-21. In P. obsoletus, Goldfuss, I the shell is oblique, and more oval and rounded in form than in P. sublwvis. P. subpulvina-tus, d'Archiac, ' from the Tourtia of Tournay, is also more oblique and has the posterior border more rounded. For the relation of this species to P. nmbonatus, Sowerby, see p. 70. The two examples described by Keeping (vide supra) from the Lower Greensand of Upware appear to differ from P. sublwvis in being less inflated and in having a higher area, but the specimens are not sufiiciently perfect to allow me to give a definite opinion on their atfinities. ' T;/pes.----From Blackdown; in the British Museum. Distributi0n.--Greensand of Blackdown (zones xi and xii); Lower Gault (zone vi) of Folkestone (fide Price). Desc'ripti0n.--Shell rather inflated and more or less circular or slightly subquadrate, usually a little higher than long, nearly equilateral. Anterior margin' 1 'Petref. Germ., ' vol. ii (1837), p. 160, pl. cxxvi, fig.-L; Geinitz, " Das Elbthalgeb. in Sachsen " ' Palzeontographica, ' vol. xx, pt. i (1873), p. 223, pl. xlix, figs. 7-----11. 2 'Mem. Soc. Geol. de France, ' ser. 2, 'ol. xii (1846), p. 306, pl. xv, fig. 2. generally evenly rounded, sometimes forming an obtuse but rounded angle with more

Product details

  • Paperback | 116 pages
  • 189 x 246 x 6mm | 222g
  • United States
  • English
  • black & white illustrations
  • 1236857925
  • 9781236857927