48 THE HOUSE I LIVE IN. 



understanding my explanations of their shape 

 without it, that I will show you a picture of 

 them. 



These bones are called in books the ossa 

 innominata. Os is a Latin word for bone ; 

 and ossa is its plural, meaning more bones than 

 one. Innominata means without a name, or 

 nameless ; but the very word innominata makes 

 a tolerable name, though rather long. So if a 

 very young child, found in the streets, whom 

 nobody knew, should be called Peter Name- 

 less, that word nameless would answer all pur- 

 poses. 



STRUCTURE. I have said that the ossa in- 

 nominata were very firm and strong. They 

 are so in grown persons but in a child they 

 are less so, and are in three pieces, each of 

 which has a different name. They are joined 

 together by a firm gristle or cartilage. Behind, 



