CHAP. XIJI 



THE SKELETON 



231 



is plugged with cartilage against which abuts the inner end 

 of the columella of the ear. - 



In the ventral side of the skull is a large bone, the para- 

 basal, or parasphenoid, which is in the shape of a dagger with- 



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out any handle ; the lateral portions underlie the two prootics. 

 The fronto-parietal bones form most of the roof of the 



