. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. 1502 VOICE. minute anatomy of the several species ; they have been recently investigated and detailed in a monograph by Henle. Sauria.— In the Crocodile the larynx is com- posed of three cartilages, namely, the thy- roid and cricoid consolidated into one ring- formed cartilage, called the thyro-cricoid, and the two arytenoid cartilages. The basi-hyoid element of the hyoid bone is expanded into a disc; and lies in front of the larynx, which it protects and supports. The arytenoid car- tilages are connected with the superi
. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. 1502 VOICE. minute anatomy of the several species ; they have been recently investigated and detailed in a monograph by Henle. Sauria.— In the Crocodile the larynx is com- posed of three cartilages, namely, the thy- roid and cricoid consolidated into one ring- formed cartilage, called the thyro-cricoid, and the two arytenoid cartilages. The basi-hyoid element of the hyoid bone is expanded into a disc; and lies in front of the larynx, which it protects and supports. The arytenoid car- tilages are connected with the superior margin of the thyro-cricoid by a membranous suture, but nothing approaching to a joint furnished with ligaments and synovial membrane is ob- servable. The mucous membrane of the larynx is reflected over the inferior margins of the arjtenoid cartilages, and forms a deep pouch beneath them, leaving a free fold with a margin on each side; so that, when these cartilages are brought near each other, this fold forms the vocal cord, and produces the tones peculiar to the Alligators In the Ca- meleon the larynx is provided with a sac in front, similar to that observed in some of the Quadrumaua. The air passes to and from this sac by means of an opening, lying between the lower margin of the larynx and the first ring of the trachea. The larynx of this ani- mal has been very minutely described by Treviranus. Some reptiles have a membrane at the base of the tongue, which answers to the epiglottis ; others have a cartilaginous epiglottis ; others again a mere bony or cartilaginous processus epiglotticus, as in birds. " But," observes Henle, " the presence of this process does not imply that there is no epiglottis, or con- versely, the presence of an epiglottis that there is no processus ; Cuvier de- scribed five cartilages in the larynx of the crocodile, but it is now generally admitted that he was mistaken. The vocal cords are more perfectly deve- lo
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