120 



M. Bectus Capitis Posticus Minor. 



This muscle is much larger and broader than the Eectus 

 Capitis Posticus Major. As in the human subject, it lies 

 in the triangle between the Rectus Capitis Posticus Major, 

 and the midline of the neck. It is a broad flat muscle, 

 with origin and insertion muscular. It has a curved origin 

 from the posterior rim of the atlas, and is inserted into the 

 occiput in a curved ridge, just back of, and below the in- 

 sertion of the Splenius. It is relatively much larger, 

 when compared with the Rectus Capitis Posticus Major, 

 than it is in man. 



The Rectus Capitis Posticus Major is very small and, ex- 

 cept from its apparent homology to this muscle, does not 

 merit the name which has been applied to it. 



M. Obliquus Capitis Inferior. 



This muscle is large and of irregular trapezoidal form. 

 It has a muscular origin from the side of the spine of the 

 axis, throughout its entire length, and also from the spine 

 of the third cervical vertebra. Its insertion is also mus- 

 cular into the lateral process, along its whole length, and 

 opposite the origin of the Obliquus Superior. 



M. Obliquus Capitis Superior. 



This muscle is smaller than the M. Obliquus Inferior. 

 It has a muscular origin from the transverse process of the 

 atlas, and is inserted just behind and above the opening of 

 the Meatus Auditorius Exteruus into the skull. This in- 

 sertion is just above that of the M. Rectus Capitis Anti- 

 cus Minor. Mivart says, "The Rectus Capitis Posticus 

 Major and Minor, as well as the Obliquus Capitis Supe- 

 rior and Inferior are all normal, but the Obliquus Supe- 



