Report on the Scientific Results of the Voyage of H.M.S. Challenger During the Years 1873-76 Under the Command of Captain George S. Nares and the Late Captain Frank Tourle Thomson Volume . 5, . 2

Report on the Scientific Results of the Voyage of H.M.S. Challenger During the Years 1873-76 Under the Command of Captain George S. Nares and the Late Captain Frank Tourle Thomson Volume . 5, . 2

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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. 1881 edition. Excerpt: ...at all distinctly. Extreme height of the largest specimen, 130 mm. Average breadth of the calicles, 10 mm. Diameter of the stem at the base of the stoutest specimen, 12 mm. Station 320. Off the mouth of the Kio de la Plata. 600 fathoms. Lophohelia. Lophohelia prolifera, Milne-Edwards and Haime (Hist. Nat. des Cor., vol. ii. p. 117). (PI. VIII. figs. 7, 8.) This coral, so abundantly dredged by the "Porcupine" Expedition, and obtained also in deep water by the American expeditions, was dredged only four times by the Challenger, but once in very great abundance. The specimens then obtained showed groat varieties in their form, and, amongst others, examples of Professor Martin Duncan's variety gracilis.1 Professor Duncan has dwelt at length on the structure, affinities, and varieties of this species in his memoir on the Madreporaria of the Deep Sea.2 1 Madreporaria of the Deep Sea, part i. p. 332, pL xiii. figs. 1, 2.-Ibid., part i. p. 328, et seq. I give here a woodcut of a specimen dredged by the " Porcupine" Expedition, taken from Sir C. Wyville Thomson's Depths of the Sea. A large number of the specimens dredged off Nightingale Island were living. The animal was of a uniform dead-white colour, without any pinkish tinge. The mouth is circular, with twelve small plaits at its margin. There are twenty-four tentacles arising from the inner margins of the primary, secondary, and tertiary septa. The tentacles borne by the primary and secondary septa are carried erect whilst the animal is at rest in the expanded condition, whilst those of the tertiary are held more horizontally or are recurved. The tentacles are long and attenuated, terminating in a very slight knob. An elevation or ridge formed by the soft parts leads from the base...show more

Product details

  • Paperback | 166 pages
  • 189 x 246 x 9mm | 308g
  • Rarebooksclub.com
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236547977
  • 9781236547972