TRISTAN. 



169 



the eyes {see PI. 22) indicates, as a rule, free breathing 

 power and strong muscles of mastication ; for the bones of that 

 part {frontal bones) form a portion of the roof of the cavities 



Fig. 172. — Mr. Lefevre's Tristan. 

 {Drawn from a ;photograph^ 



through which air enters on its way to the lungs, and gives 

 attachment to a powerful muscle which aids in closing the 



