32 



THE MYOLOGY OF THE RAVEN. 



FIG. 11. Under view of the head of a Haven, with mandible in situ, but with 

 hyoid apparatus and other parts carefully removed. Dissected to show 

 the muscles which occur upon this aspect ; the left side (the right in 

 the figure) shows the origin and insertion of the ptcrygoideus internus. 

 The opposite side is dissected to show the entotympanicus and pf.ery- 

 goideus cxternus. The anterior two-thirds of the mi/lo-hyoideus is also 

 shown, and its mode of attachment. The digastric is cut off close at 

 its point of origin. This figure should be carefully compared with 

 Fig. 3 of the present memoir. Life-size, by the author from his own 

 dissections. 



here glide beneath the thyroid bone of the superior 

 larynx. Just beyond this point they become fully 



