Memoirs of the Museum of Comparative Zoology at Harvard College Volume 41

Memoirs of the Museum of Comparative Zoology at Harvard College Volume 41

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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. 1910 edition. Excerpt: ...The seven specimens of this sponge are labeled 6312. In the list of the specimens sent, 6312 does not occur, nor, except 6311, any number near it. There is therefore some probability that 6312 should be 6311, the locality of which is New Zealand, so that New Zealand may be the habitat of these sponges. Although I have not been able to make out quite clearly the nature of the entrances and exits of the canal-system, I think there can be little doubt that both are cribriporal. For this reason and because the skeleton is distinctly geodine in character, I place these sponges in Geodia. The sponges described by Kieschnick ' as Cydonium sphaeroides, by Lindgren 2 as Geodia arripiens, and 1 O. Kieschnick. Silicispongiae von Ternate. Zool. anz., 1896, 19, p. 529. 2 N. G. Limltjren. Beitrag zur kenntniss der spongienfauna des Malayischen Archipels. Zool. jahrb. Syat., 1898,11, p. 346, plate 18, figs. 10, 18, plate 20, fig. 5. by Thiele 1 as G. sphaeroides seem to be allied to them. These sponges I consider2 one species, Geodia sphaeroides. The chief characters of Geodia sphaeroides and G. lophotriaena are tabulated below. lJ. Thiele. Kieselschwatnme von Ternate I. Abhandl. Senckenb. gesellsch., 1900, 26, p. 41, plate 2, fig. 14. 3 R. v. Lendenfeld. Tetraxonia. Tierreich, 1903,19, p. 110. This table shows that these two species, although very similar in many respects, differ considerably in others. The difference in the shape of the body, the thickness of the cortex, and the length of some of the megascleres might be considered as due to differences of age or to differences in individual adaptation. That plagiotriaenes are present in G. lophotriaena and not mentioned as occurring in G. spMeroides would, in itself, also hardly be sufficient for...show more

Product details

  • Paperback | 136 pages
  • 189 x 246 x 7mm | 254g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 123687658X
  • 9781236876584