268 MAMMALIAN ANATOMY 



(8) The distance from the anterior edge of the parietal angle to 

 the anterior end of the orbitosphenoid ; 



(9) The width of the posterior sphenoid at the posterior angles ; 



(10) The width of the anterior sphenoid taken in its narrow part 

 just before the lateral borders begin to turn outward on the small 

 wings ; 



(11) The width of the basisphenoid taken on the posterior border 

 between the outer edges of the lingula ; 



(12) The median length of the basisphenoid from the olivary 

 eminence to the posterior border. 



On the inferior surface are measured : 



(13) The median length of the presphenoid ; 



(14) The median length of the basisphenoid ; 



(15) The extreme anterior width of the presphenoid ; 



(16) The distance between the anterior ends of the hamular pro- 

 cesses ; 



(17) The distance between the tips of the external pterygoid pro- 

 cesses ; 



(18) The distance between the inner edges of the foramina ovalia ; 



(19) The distance between the sphenoidal angles (the angle behind 

 the foramen ovale). 



