American Hydroids Volume 1-2

American Hydroids Volume 1-2

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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. 1900 edition. Excerpt: ...or outward, margin often with a single broad tooth on its posterior side. Operculum of a single abcauline flap. G'1mu.s-ome.--Gonangia borne on upper side of branches, long, slender, with a round aperture, narrow collar, and operculum. Dz'stribution.--Common on British and Continental shores of North Atlantic; New England Coast (Verrill); "Atlantic coast" (specimen from the United States National Museum); Iceland (Swmundsson); Gulf of St. Lawrence (Whiteaves); 1 Barents Sea (D'Urban); Polar Sea (Bonnevie). In the absence of the gonosome this species is not always easy to distinguish from T. cupressina. The habit of growth, however, is entirely different from the graceful spiral arrangement which characterizes the latter. Branches stiffer and harsher. The gonosome is entirely different. The species appears to be rare on our Atlantic coast. The synonymy of this species is exceedingly uncertain on account of a mistake of Pallas' who gave the name Sertulm-ia articulata to an Atlantic species under the mistaken impression that it was identical with the " Sea-Spleenwort" of Ellis. Afterwards Fleming (1842) instituted the genus T/miar-ia, and, apparently misled by Pallas, called the Spleenwort of Ellis T /zuiaria articulata. In the meantime Ellis and Solander (1758) gave the name Sertularia lorw/iitis to Ellis's species of Sea-Spleenwort, thus securing the priority for the name lone/zz't1.'s, which is essentially a northern form. Since that time most writers have confused the two species under the common name Yhuiamkz rtrtioulata. Hincks in his great work (1868) seems to have done this. In 1884 Kirchenpauer clearly explained the situation and reestablished the name T. lorwhitis for Ellis's species, ...show more

Product details

  • Paperback | 274 pages
  • 189 x 246 x 15mm | 494g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236751019
  • 9781236751010