1901.] 



THE MUSCLES OF THE VSQl'LXTX. 



671 



ceratuhyal, to the front of the epiglottis. It is present in the 

 Tragulidae and Bovidse and possibly in other families. 



Sterno-hifoid. — In the Hippopotamus the sterno-hyoid rises as 

 usual from the deep surface of the manubrium stern i in its 

 anterior part, and runs forwards to be closely connected with the 

 cephalo-humeralis, so that Cuvier (XXX11I.) describes it as part 

 of the " deltoido trapeze " ; it can, however, be traced forward, 

 aud it is then found to divide into two layers, of which the more 

 superficial continues forward to near the symphysis of the 

 mandible, and is sometimes called mento-hyal, while the deeper 

 layer is inserted into the basihyal. 



Text-fig. 89. 



Eyoid apparatus of the Duiker-bok. 



1. Hyoideua latua. 



2. Btylo-byal bone. 

 .';. Epi-byal bone, 



i. Oerato-hyal bone. 

 5. Tliyro-hyal bone. 



In the Suidic(4, 6, 7, 11, 12, 13, 14) the muscle is very well 

 developed: and in our specimens it was supplied by the ansa 

 cervicis as in .Man. 



In the Tragulidae (21) the two muscles of opposite sides are 

 closely connected, and they are also fused with the sterno- 

 thyroids in the posterior par! of the neek (20). 



Among the Cervidaa the muscle ia very slight in fin 1 Deer (25) 

 and Brocket (28). 



In the GiraffldsB the muscles of opposite sides are Fused near 



