. On the anatomy of vertebrates [electronic resource] . ntricle is shallow. The voice ofthe Ai {Bradypus tridactylus) is feeble andplaintive; that of the Choloepus didactylus, cap-tive at the London Zoological Gardens, hasnever been heard there. The Armadillos, also,appear to be habitually mute: only the lowervocal cord is manifest: the ventricle is obsolete:the epiglottis is deeply notched at the Inthe great Anteater (Myrmecophaga jubata) thethyroid cartilage is ossified. The cricoid is car-tilaginous. The arytenoids are low obtuse carti-lages. The lower 4 chordae vocales extend fromth
. On the anatomy of vertebrates [electronic resource] . ntricle is shallow. The voice ofthe Ai {Bradypus tridactylus) is feeble andplaintive; that of the Choloepus didactylus, cap-tive at the London Zoological Gardens, hasnever been heard there. The Armadillos, also,appear to be habitually mute: only the lowervocal cord is manifest: the ventricle is obsolete:the epiglottis is deeply notched at the Inthe great Anteater (Myrmecophaga jubata) thethyroid cartilage is ossified. The cricoid is car-tilaginous. The arytenoids are low obtuse carti-lages. The lower 4 chordae vocales extend fromthe arytenoids forward, the fold containing themexpanding as they advance. There is a shallow fossa beneaththis fold and a deeper one representing the ventricle above small einterarticular fibro-cartilage supports an obtuse pro-minence near the hinder ends of the epiglottidean folds, whichare continued back to the arytenoids. The larynx includes, in Cetacea, the usual Mammalian carti-lages, much modified in shape and proportions. The thyroid in 460. Larynx of 1 Referred by Brandt to Pteropus Vampirus, in ccxvmcopies the figure, to Phyllostoma Spectrum, cccxx, fig. cxxvn. p. 144. and by Bishop, who LARYNX OF MAMMALIA. 587 Balcenoptera is but little convex transversely; the wings unite atan open angle ; the breadth much exceeds the length, but thelower angles are produced and continued clown outside the cricoid :this is a thick cartilage, broad and flat posteriorly, with a thickupper margin and an irregular thinner lower one : it is incompleteat the fore-part, from which the lining membrane of the larynxprotrudes and expands into a large sacculus. In PhoccBna thethyroid, from the great extension of the inferior cornua, seems toconsist of two semilunar car-tilages united at their anteriorextremities. The cricoid isincomplete at the fore part,but does not give passage toa laryngeal sac. The aryte-noids, articulated to the cricoidby a broad base, are of un-u
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