. Comparative zoology, structural and systematic. For use in schools and colleges. Zoology. 176 COMrARATlVE ZOOLOGY. the Clam, it is found at the base of the foot; some Grass- hoppers have it in the forelegs; and in many Insects it is. Fig. 148.â and Auditory Apparatus of the Cuttle-fish: apparatus; d, the cavity in which it is lodged ; e, f, g, e; o, 6, braiu ; c, auditory iS; 1,2,3, otoliths. on the wing. Lobsters, Crabs, and most Insects have the auditory sacs at the base of the antennae.'"" A complex organ of hearing, located in the head, exists in all Vertebrates, save tli
. Comparative zoology, structural and systematic. For use in schools and colleges. Zoology. 176 COMrARATlVE ZOOLOGY. the Clam, it is found at the base of the foot; some Grass- hoppers have it in the forelegs; and in many Insects it is. Fig. 148.â and Auditory Apparatus of the Cuttle-fish: apparatus; d, the cavity in which it is lodged ; e, f, g, e; o, 6, braiu ; c, auditory iS; 1,2,3, otoliths. on the wing. Lobsters, Crabs, and most Insects have the auditory sacs at the base of the antennae.'"" A complex organ of hearing, located in the head, exists in all Vertebrates, save tlie very lowest Fishes. As com- plete in Man, it consists of the following parts: 1st, The external ear (which is pe- culiar to Mammals); the auditory canal, about an inch long, lined with hairs and a waxy secretion, and closed at the bottom by a membrane, called tyinjpa- num, or " drum of the ; 2d. The middle Fig. 149.âSection of Human Ear: a, external ear, Containing three little ear, with auditory canal; 6, tympanic cavi- , , â , â ,â , , . .i ^ ty containing the three bones; 0, hammer, OOUCS (the Smallest HI tllC and its three "luscles, rf, e f; g, tympanic ^^ x mcdleUS, inCUS, and membrane, or head of the drum ; h, Eusta- "^"^J /J ' ' chian tube leading to the pharynx; i, laby- gtapCS. articulatcd tOgCth- riuth, with semicircular canals and cochlea -C ^ o ^ visible. er. The cavity commnm- cates with the external air by means of the Eustachian tube, which opens at the back part of the mouth. 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 Orton, James, 1830-1877. New York, Harper and brothers
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Keywords: ., bookcentury1800, bookdecade1880, bookpublishe, booksubjectzoology
