. Seaside studies in natural history. Marine animals. Fig. 145. no doubt that they are constantly filled with water, and are therefore directly connected 'with the circulation through the madreporic body (Fig. 145), no external opening has as yet been detected in them. The fact, however, that when these animals are taken out of their native element, the water pours out of them all over the surface of the back, so that they at once collapse and lose entirely their fulness of outline, seems to show that water does issue from those tubes. The ends of the arms are always slightly turned up, and at
. Seaside studies in natural history. Marine animals. Fig. 145. no doubt that they are constantly filled with water, and are therefore directly connected 'with the circulation through the madreporic body (Fig. 145), no external opening has as yet been detected in them. The fact, however, that when these animals are taken out of their native element, the water pours out of them all over the surface of the back, so that they at once collapse and lose entirely their fulness of outline, seems to show that water does issue from those tubes. The ends of the arms are always slightly turned up, and at the simimit of each is a red eye-speck. The tentacles about the eye become very delicate and are destitute of suckers. These animals have a singular mode of eating ; they place themselves over what- ever they mean to feed upon, as a cockle- shell for instance, the back gradually rising as they arch themselves above it; they then turn the digestive sac or stom- ach inside out, so as to enclose their prey Fig. 143. Single spine of Star-flsh, with surrounding appendages; magniSed. Fig. 144. Limestone network of bacit of Star-flsh. Fig. 145. Madreporic body of Star-flsh ; Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Agassiz, Elizabeth Cabot Cary, 1822-1907; Agassiz, Alexander, 1835-1910, joint author. Boston, J. R. Osgood and Company
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectmarineanimals, bookye
