. Animal studies. . Fig. 231.—Auditory organ of a mollusk. a, audi- tory nerve; b, outer wall of connective tissue; c, cells with auditory hairs ; d, otolith.—After Letdig. Fig. 232. —Antenna of cray - fish, with audi- tory sac at base.— After Huxlet. surface of the sac is lined with fine auditory hairs. The sound waves coming through the air or water outside strike against this sac, which lies in a hollow on the upper or outer side of the antennas. The sound waves are taken up by the contents of the sac and stimulate the fine hairs, which in turn give this stimulus to the nerves which run fro
. Animal studies. . Fig. 231.—Auditory organ of a mollusk. a, audi- tory nerve; b, outer wall of connective tissue; c, cells with auditory hairs ; d, otolith.—After Letdig. Fig. 232. —Antenna of cray - fish, with audi- tory sac at base.— After Huxlet. surface of the sac is lined with fine auditory hairs. The sound waves coming through the air or water outside strike against this sac, which lies in a hollow on the upper or outer side of the antennas. The sound waves are taken up by the contents of the sac and stimulate the fine hairs, which in turn give this stimulus to the nerves which run from them to the principal auditory nerve and thus to the brain of the cray-fish. Among the insects other kinds of auditory organs exist. The common locust or grasshopper. 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 Jordan, David Starr, 1851-1931; Kellogg, Vernon L. [from old catalog].
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Keywords: ., bookauthorjordanda, bookcentury1900, bookdecade1900, bookyear1903
