. Quain's elements of anatomy . separates theanterior from the posterior surface, is oblique. The lase of each arytenoid cartilage is slightly hollowed, havingtowards its outer part a smooth surface for articulation with the cricoidcartilage. Two of its angles are remarkably prominent, viz., oneexternal, short, and rounded, which projects backwards and outwards,and into which the posterior and the lateral crico-arytenoid muscles areinserted {muscular ^wocess) ; the other ajiterior, which is more pointed,and forms a horizontal projection forwards, to which the correspondingtrue vocal cord is at
. Quain's elements of anatomy . separates theanterior from the posterior surface, is oblique. The lase of each arytenoid cartilage is slightly hollowed, havingtowards its outer part a smooth surface for articulation with the cricoidcartilage. Two of its angles are remarkably prominent, viz., oneexternal, short, and rounded, which projects backwards and outwards,and into which the posterior and the lateral crico-arytenoid muscles areinserted {muscular ^wocess) ; the other ajiterior, which is more pointed,and forms a horizontal projection forwards, to which the correspondingtrue vocal cord is attached (vocalprocess). The cqyex curves backwards and a little inwards, and terminates in ablunt point, which is surmounted by the corniculum laryngis. A small cartilaginous nodiile (sesamoid cartilage) is sometimes found at theside of the arytenoid near the tip, embedded in the perichondrium. The cornicula laryngis, or cartilages of Santorini, are two smallyellowish cartilaginous nodules of a somewhat conical shape, which are. THE EPIGLOTTIS. 525 articulated with the summits of the arytenoid cartilages (fig. 451), andserve as it were to prolong them backwards and inwards. They some-times form part of the arytenoid cartilages. The cuneiform cartilages, or cartilages of Wrisberg, are twovery small, soft, yellowish, cartilaginous bodies, placed, one on each side,in the fold of the mucous membrane which extends from the summit ofthe arytenoid cartilage to the epiglottis. They have a conical form, withthe base directed upwards. They occasion small elevations of the mu-cous membrane, a little in advance of the cornicula, with which, however,they are not directly connected. These cartilages are very frequently absent, especially in white races ofmankind, but according to Gibb are always present in tlie negro. The epiglottis (fig. 451, 7) is a median lamella of yellow cartilage,shaped somewhat like an obovate leaf, and covered by mucous mem-brane. It is placed in front of the sup
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