A Monograph of the British Fossil Brachiopoda Volume 1

A Monograph of the British Fossil Brachiopoda Volume 1

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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. 1854 edition. Excerpt: ...fixed to submarine bodies by means of a pedicle issuing from a foramen in the beak of larger valve; edges of the mantle thin, entire, and fringed by short cilia, vascular system ramified, and situated on the mantle. Shell punctuated, variable in shape, inequivalve, elongated or transverse; convex or depressed, beak more or less produced, truncated by a foramen of variable dimensions, valves articulating by the means of two teeth in larger and corresponding sockets in smaller valve; internal riband-shaped lamella (partly supporting the ciliated arms), attached only to the crura, short or elongated, and more or less folded back on itself. Obs. Nearly all our Cretaceous Terebratulae had a short loop. T. longa, of Roemer, is an exception, in it the apophysary system extended to near the frontal margin, as in Ter. lagenalis, &c. 16. Terebratula Capillata, D'JrcMac. Plate V, fig. 12aled. Terebratula Capillata, D'Archiac, 1846. Bull. de la Soc. Ge'ologique de France, vol. iii, 2de aer., p. 336; and 1847, Memoires de la Soc. Geol. de France, vol. ii, 2de eer., p. 323; pi. xx, figs. 1, 2, and 3.----Bronn. Index Pal., p. 1232, 1848. Diagnosis. Shell irregularly oval, or somewhat pentangular, longer than wide; valves unequally convex, the dental or larger one the most so, no mesial fold or sinus; valves regularly convex to the front; margin line presenting a slightly elevated curve, or biplication in front; beak short, rounded and recurved, diagonally truncated by a large circular foramen, a portion of which is completed by a small deltidium in two pieces; beak ridges not always well defined, soon turning in to meet the hinge margin; surface ornamented by a vast number of minute radiating capilliform elevated striae close together, unequal, and more or...
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Product details

  • Paperback | 204 pages
  • 189 x 246 x 11mm | 372g
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 123655311X
  • 9781236553119