THE OCCIPITAL CONDYLES 



In Fig. 46 I have photographed the whole 

 back part of a skull which contained the brain, 

 and you see where the spinal cord entered the 

 skull to join the brain. In this creature (an 

 ox) there are two bony surfaces (marked Ex, Ex) 



Fic. -46. — Photograph u I thu back of a skull of an Ox, to show 

 the two occipital condyles, Ex, Ex. 



forming the joints or condyles of the skull by 

 which the first neck-bone or vertebra was 

 fastened to it whilst allowing a rotating move- 

 ment. All mammals' skulls are provided with 

 this jjafr of knobs or " condyles." But in the 

 crocodile's skull (Fig. 47) you will see below 



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