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of the Genio-glossns, inserted on the inner side of the 

 Sterno-glossus, above the Annukis Intimns. 



M. Genio-glossus Posticus Externus. 

 This is a small muscle without tendons, and has an ori- 

 gin a little in advance of a line drawn from the anterior 

 border of one orbital foramen, to the other. It originates 

 from the Genio-glossus, and in part from the inner edge of 

 the lower jaw, with the M. Genio-glossus Posticus luter- 

 nus. It is inserted into the outer side of the base of the 

 tongue, at its posterior margin, and just above the outer 

 part of the Annulus Intimus. 



M. Genio-glossus Posticus Internus. 



This muscle is thinner than the Genio-glossus Posticus 

 Externus. It arises from the same place, but is inserted 

 upon the inner side of the Sterno-glossus in a medial 

 position, just above the Annulus Internus at its inner 

 origin. It lies superficially to the Genio-glossus. Both 

 the Genio-glossi Postici blend so intimately at their ori- 

 gins, that they may both be simply a part of the true 

 Genio-o^lossus, 



M. Rectus Capitis Posticus Major. 

 This is a very small muscle, which arises from the 

 anterior extremity of the spinous process of the axis, 

 and is inserted into that position of the skull, which cor- 

 responds to the inferior curved line of the human occi- 

 put. The insertion is more or less tendinous. The 

 muscle does not broaden as it nears its insertion, but its 

 width throughout is about the same. It lies in a groove 

 between the Rectus Capitis Posticus Minor, and the Obli- 

 quus Superior. 



