Carnegie Institution of Washington Publication Volume 109, V. 2

Carnegie Institution of Washington Publication Volume 109, V. 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. 1910 edition. Excerpt: ...4 simple, somewhat flaring lips. 4. canals arise from the 4. corners of the stomach, but 2 of these primary canals bifurcate immediately after leaving the stomach so that there are 6 radial-canals which reach the circular vessel 60 apart. The ring-canal is broad and gives rise to numerous blindly ending, centripetal l hich increase with age In young medusa: 15 mm. in diameter, the centripetal vessels cana s, w. ran ed from 11 to 14. per sextant, about 78 in all; whereas in a mature medusa 75 mm. wide g the centripetal canals varied from 18 to 23 in the several sextants, or about 120 all told. i d' l l nd extend Th 6 onads are loldings of the subumbrella walls of the 6 ra ia-cana s a e g throu hout the greater portion of their lengths, leaving only a short proximal, and a much..d 8 shorter distal, extremity of the canal free. The young gonads are sinuously folded from si e to side of each canal, but later they give rise to numerous lobes, which may become secondarily lobed, as in Olina'ia: . Th ' f the exumbrella tentacles are transparent lilac; their middle and proximal e tips o l n ths are smaragdine-green. The peronial strands and basal parts of those tentacles which e g project from the exumbrella at a high level are ivory-black. The radial and circular canals i i l. Th e is a d carlet and the centripetal vessels are of a lighter hue of the same co or er are eep s small green, triangular spot at each of the 4 corners of the base of the manubrium, on either....l side ofwhich there is a lilac area, and there are one or two somewhat irregular longitudinal li ac ' ' ' ' f fthe filiform t eaks alon the middle of each side of the manubrium. The tips o some 0 s r g tentacles are tinged with green and lilac. The gonads are egg-yellow. more

Product details

  • Paperback | 142 pages
  • 189 x 246 x 8mm | 268g
  • United States
  • English
  • black & white illustrations
  • 1236852990
  • 9781236852991