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, R.N., F.R.S. and Captain Frank Turle Thomson, R.N.

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Identifier: reportonscientif21grea (find matches)
Title: 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, R.N., F.R.S. and Captain Frank Turle Thomson, R.N.
Year: 1887 (1880s)
Authors: Great Britain. Challenger Office Challenger (Ship) Thomson, C. Wyville (Charles Wyville), Sir, 1830-1882 Murray, John, Sir, 1841-1914 Nares, George S. (George Strong), 1831-1915 Thomson, Frank Tourle
Subjects: Challenger Expedition, 1872-1876 Scientific expeditions
Publisher: Edinburgh : Neill
Contributing Library: MBLWHOI Library
Digitizing Sponsor: MBLWHOI Library

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is ; x 100. Fig. 27. Compact tetract with four unequal rounded rays in one plane; x 100. Fig. 28. Compact tetract in which two of the rays, lying in the same axis and in a straight line, are ofequal length and truncated, while of the two rays in the other cross axis, one is longerand terminally truncated, while the fourth is much shorter and rounded off like a club;X 100. Fig. 29. An anchor needle from the basal root-tuft, representing a diact in which the two rays are inone axis and straight, but beset with prosimally curved lateral teeth. While the oneproximal ray is very long and terminally pointed, the distal is short and ends in ananchor-shaped expansion with eight recurved, paddle-shaped, anchor teeth. In thisanchor-shaped expansion the axial canal breaks up into a tuft of terminal canals. Some-what above the inferior extremity is seen the axial intersection of the central canal,representing the centre of the diact; x 300. Ihc Voyage of H.M.S. .Challenger. Hexaclinellida PI. Dl.
Text Appearing After Image:
EE Schulze and G Finsch M EUPLECTELLA ASPERGILLUM. Owen. PTiATE IV. PLATE IV. PAGE The soft parts of Euplectella aspergillum, Owen, . . 64 Fig. 1. Part of the outer surface of the tube-wall, from a specimen preserved inabsolute alcohol; natural size. Fig. 2. Part of the inner surface of the tube-wall of the same specimen; naturalsize. Fig. 3. Transverse section of a ridge, with part of the tube-wall of the samesponge. The section corresponds to one of the larger efferentopenings of the exhalent canal system (combination figure); x 16. Fig. 4. Outer portion of a thin section, perpendicular to the outer surface, throughthe side wall of a ridge ; x 150. Fig. 5. External view of a small piece of the outer membrane from the side wallof a ridge ; x 400. Fig. 6. Transverse section of a layer of ciliated chambers with a sperm-mass ;x400. Fig. 7. Part of the wall of a ciliated chamber; x 600. Fig. 8. A small portion of the network of the efferent lacunar system of a ridge ;X 600. Tlu- Vovage o

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