. Animal studies. THE SPECIAL SENSES 381 has on the upper surface of the first abdominal segment a pair of tympana or ear-drums (Fig. 233), composed sim- ply of the thinned, tightly stretched chitinous cuticle of the body. On the inner surface of this. FiGo 233.—Grasshopper, showing auditory organ (a. o.) in first segment of abdomen. (Wings of one side removed.) ear-drum there are a tiny auditory sac, a fine nerve lead- ing from it to a small auditory ganglion lying near the tympanum, and a large nerve leading from this ganglion to one of the larger ganglia situated on the floor of the. Please
. Animal studies. THE SPECIAL SENSES 381 has on the upper surface of the first abdominal segment a pair of tympana or ear-drums (Fig. 233), composed sim- ply of the thinned, tightly stretched chitinous cuticle of the body. On the inner surface of this. FiGo 233.—Grasshopper, showing auditory organ (a. o.) in first segment of abdomen. (Wings of one side removed.) ear-drum there are a tiny auditory sac, a fine nerve lead- ing from it to a small auditory ganglion lying near the tympanum, and a large nerve leading from this ganglion to one of the larger ganglia situated on the floor of the. 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
