16 



ON THE ANATOMY OF THE 



the number of pieces in the coccyx, the Orang re-» 

 sembles man. The coccyx of the baboon consists 

 of at least five pieces. 



The ends of the ossa ilia are united to the pubis 

 and ischium, by distinct cartilages, which are ful- 

 ly 0.3 inch in width externally ; but though this 

 shews the youth of the animal now under consider- 

 ation, the ischia and pubis have no line of separa- 

 tion. The dimensions of the pelvis will be best un- 

 derstood from the following measurement. 



Os innominatum from the top of ilium to the I n ch «- 



tuber ischii, == 5.8 



Os ilium from its junction with the pubis to 



its top, 3.7 



Diameter of the pelvis across the broadest 



part of the ilia, 4.5 



Inside diameter of the brim of the pelvis 



from pubis to sacrum, 2.5 



Inside diameter of do. from side to side, at 



the union of ilia and pubis, 1.4 



Ditto, a little higher between the crura of the 



ilia, 1.6 



— from the point of the coccyx to the inser- 

 tion of the sacro-sciatic ligament in tuber 

 ischii, 2.0 



— between the tuberosites of the ischia, ... 2.3 



— from the point of the coccyx to inside 



of arch of pubis, t 2.4 



