596 



ANATOMY OF VERTEBRATES. 



n;s 



469 



and the lateral halves are connected chiefly by ligament. The 

 ar\ tcnoids, fig. 468, are rhomboid : between them at the hind 

 part of the rim a, glottidis are the sesamoid cartilages, ib. d, d, 

 upon which a few muscular fibres act. Cuneiform and santorinian 



cartilages are also present. The lower 

 vocal ligaments rise, as they advance, 

 toward the upper ones. The epiglottis 

 is broad, with an obtuse apex. In the 

 Badger the laryngeal sacs are deep and 

 bifid, one portion extending to beneath 

 the root of the tongue, the other to be- 

 tween the thyroid and cricoid cartilages. 



Him. -i glnttidis, with aryteiioid and J 



scsainiml cartilages, Ursus Mala- J n f] ie Qtter tll6 anterior cleft of tllC 

 yanus. cxrxx. . 



cricoid, ng. 469, c, extends to near the 



upper border : the lower or hinder border of the thyroid, ib. b, is 

 deeply emarginate : the middle of the upper border shows a 

 rounded apex, like a process : the epiglottis a is oval. 



In the Dog the epiglottis is triangular, with a medial furrow at 



the base : the ventricles are deep : santori- 

 nian and cuneiform cartilages are present, 

 superadded to the arytenoids which curve 

 away from each other. In the Cat tribe the 

 upper vocal cords, fig. 470, c, are unusually 

 prominent, and by their vibration cause the 

 ' purring ' sound : the lower vocal cords, ib. d, 

 are shorter and less prominent, and do not 

 support any membranous appendages : the 

 epiglottis, ib. b, is triangular with a subacute 

 apex : in the Lion this is more obtuse. The 



ventricles form a sac between the vocal li;a- 



~ 



merits. The larynx of the Lion differs from 

 that of the Cat chiefly in its more free suspen- 

 sion, allowing the strong vibrations of all the 

 parts producing the terrific roar. In the Cat the upper cornua 

 of the thyroid are closely connected through the medium of the 

 thyro- and cerato-hyals, with the stylohyals : in the Lion a long 

 ligament intervenes between the stylo- and cerato-hyals. 



In the Aye-aye {Chiromys} the thyroid is like the prow of a 

 boat, without keel, being laterally contracted and produced: the 

 cricoid is notched at the middle of its broad back part : the crico- 

 thyroid interspace is narrow. The vocal cords are slender and 

 well defined ; between them and the epiglottis is a large and 

 deep pouch, from which a median sacculus is produced between 



Larynx of Otter, ci.rxx. 



