Proceedings of the Royal Society of Victoria Volume 6-7

Proceedings of the Royal Society of Victoria Volume 6-7

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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. 1894 edition. Excerpt: ... the Order T/zemjj/zora of which Sertu/aria and Campanzllaria are living representatives. Zitteli appears to hold the same view, as he places it in the Sub-order Camamcentslarize. The genus was originallyfounded by Professor J. Halli in the following language: ----" Fronds consisting of flabelliform or funnel-shaped expansions (circular from compression), composed of slender radiating branches, which frequently bifurcate as they recede from the base. Branches and subdivisions united laterally by fine transverse dissepiments; exterior of branches strongly striated and often deeply indented; inner surface celluliferous or serrate, as in Graptolithus." Although Professor Hall indicates the occurrence of hydrothecae in the above description, it does not seem to me absolutely clear whether the whole frond bears hydrothecae or only a portion of it. Judging from the specific descriptions, specimens with the hydrotheca: preserved must have been very rare indeed, as the majority of the species which have come under my notice have been incomplete in this respect. Manual of Palaeontology, vol. i., p. 204.' ' T Handbuch der Palaeontologie, Band 1., p. 289. I Paleontology of New York, vol. ii, p. 174, 1852. Zitte1 gives the following definition: --"Hydrosome, funnel pannier or fan-shaped, with numerous branches almost parallel, strong, forked and united by cross-threads. The ends of the branches are free, and are then set on one side with pointed hydrothecae. The latter appear very perishable, and are exceedingly seldom preserved." In this definition it is apparently intended' to indicate that only the free ends of the branches bear hydrothecae. In the specimen now before me the hydrothecae occur not only on the freshow more

Product details

  • Paperback
  • 189 x 246 x 10mm | 331g
  • English
  • Illustrations, black and white
  • 1236912020
  • 9781236912022