. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. 1. Larynx of the Rabbit laid open. 2. Side view of the same, externally. a, epiglottis ; b, thyroid; d, cricoid; c, crico-thy- roid ligament; e, trachea. Hi/strix cristata, Porcupine.—Vocal liga- ments absent. Ventricles of Morgagni none. Voice mute. Castor Fiber. The Beaver.—Larynx : II. 0'4*.5 in. Epiglottis triangular, having a vertical rap he upon its posterior surface terminating in a sac bordered by the vocal ligaments. Arytenoids small and conical. Vocal cords : L. 0'25 in. Trachea 22 rings. Voice acute. Mus Rattu
. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. 1. Larynx of the Rabbit laid open. 2. Side view of the same, externally. a, epiglottis ; b, thyroid; d, cricoid; c, crico-thy- roid ligament; e, trachea. Hi/strix cristata, Porcupine.—Vocal liga- ments absent. Ventricles of Morgagni none. Voice mute. Castor Fiber. The Beaver.—Larynx : II. 0'4*.5 in. Epiglottis triangular, having a vertical rap he upon its posterior surface terminating in a sac bordered by the vocal ligaments. Arytenoids small and conical. Vocal cords : L. 0'25 in. Trachea 22 rings. Voice acute. Mus Rattus. See details by Wolff. EDENTATA. Ornithorynchus paradoxus.— (Fig. 905.) Larynx : H. -6 in. Thyroid : wings united at an obtuse angle ; body partly cartila- ginous, and partly osseous ; supports laterally two transverse osseous processes f f, at the bases of which are two curved cartilaginous appendices. Cricoid elliptical. Arytenoid triangular. Ventricles not deep. A sulcus, d d, lies between superior ligament and cri- coid cartilage.* Epiglottis: apex acute, a. Trachea 15 rings. Armadillo.—Epiglottis bilobed. Voice mute. Brady pus tridaetylus or Sloth.— Larynx: Cart, of Santorini and superior voeal cords absent. Ventricles a mere impression. Infe- rior vocal ligaments free. Trachea convoluted. Voice _ a plaintive melody, consisting of an ascending and descending scale of tlie hexa- PACHYDERMATA. Equus.—H. 1-85. Thy- roid: wings united at an acute angle, and notched below to the pomum. Cricoid: margins, superior deflected inwards. Crico-thy- roid chink inclined both vertically and horizon- tally. Arytenoids large; bases deflected from each other, by which the glottis is always kept open. Cart, of Santorini curved or hook-like * This is described by Blainville, but Meckel seems not to have observed it. •)• Bingley, An. A. view of t/te internal mechanism of the Larynx oj Ornithorynchus paradoxus. a, epiglottis; b, superior vocal cords; c, inferio
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