Hr0IL'i:AN C.:. 



171 



GENIO-HYOIDEUS. ^ 



(Fia 71. c.) "^^ 



Covered by the preceding muscle, this is long, fusiform, and 

 tendinous at its extremities. 



Origin. — From the lower jaw, near its symphysis. 



Insertion. — The free extremity of the spur process of the os 

 hyoides. 



Relation. — Externally with the preceding muscle, superiorly 

 with the genio-hyo-glossus, and internally with its fellow. 



Fia. 71. 



' Muscles of the maxillary space— infero-lateral view. Structures removed from the right side. 

 », Genio-hyoideus ; /, Stylo-hyoideus ; g, Hyoideus magnus. 



Action. — It draws the os hyoides towards the anterio-inferior 

 part of the maxillary space. 



HYOIDEUS MAGNUS. 



(Kerato-hyoideus Magnus.) 



(Fig. 71. g.) 



Situated on the outer side of the pharynx, larynx, and 

 guttural pouch, behind the comu of the os hyoides and running 

 in the same direction, it is thin, fusiform, and tendinous at 

 either extremity. 



Origin. — From the postero-inferior angle of the cornu of the 

 OS hyoides. 



