Palaeontographical Society Monographs Volume 4, Nos. 8-10

Palaeontographical Society Monographs Volume 4, Nos. 8-10

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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. 1850 edition. Excerpt: ...thin and broadest, or outer portion, being of a brown and somewhat horny texture, while the thickened lining, or anterior portion, is of a nacreous substance, composed of fibrous filaments, causing the shell in the fossil state to separate readily at that part in a transverse direction; and pieces of this 'fibrous shell' are often met with in the Coralline Crag at Sutton, separating like finely attenuated glassy filaments. AvicULA, Klein, 1753. Prams. Scopoli, 1777, see. Gray. RIPARLE (sp.). Gevers, 1787. Id. MARGAR1TIFERA(Sp.). Hamph., 1797. ANONICA. Olcen., 1815. PERLAMATER (sp.). Sc/ium., 1817. Generic Character. Shell inequilateral, inequivalve, oblique; upper or left valve the larger or more tumid; the lower or right valve with an opening for the passage of a byssus; surface sometimes smooth, at others ornamented with squamose appendages, or furnished with radiating costae; hinge-line rectilinear, often with the posterior extremity prolonged into the form of an extended wing; one obtuse tooth in each valve; paleal impression without a sinus; ligament external. Animal triangular; the edges of the mantle disunited, and the margins fringed with small tentacles; foot small, subcylindrical, beneath which is a byssal groove; no syphonal tubes. 1. AVICULA TARENTINA '1 Lamarclc. MYTILUS nnwnno. Linn. Syst. Nat., ed. 12, p. 1159 (in part).-----'.? Poli. Test. Utr. Sic., vol. ii, p. 221, t. 32, fig. 17, 1795. AVICULA nmuxno. Turt. Brit. Biv., p. 220, pl. 16, figs. 3, 4, 1822.--ACULEATA. Risso. Hist. Nat. des Princ. Prod. de 1'Eur., t. iv, p. 308, 1826.--A'r1...z'r1c.. Brown. Illust. Conch. Gr. Brit., pl. 10, fig. 6, 1827.--Ancmcs. " Leach." Id.--pl. 31, fig. 3.--TABENTINA. Lam. Hist. des An. S. Ver., t. vi, more

Product details

  • Paperback | 142 pages
  • 189 x 246 x 8mm | 268g
  • United States
  • English
  • black & white illustrations
  • 1236794486
  • 9781236794482