PLATE VII 



Plate VII is from a section through the uppermost part 

 of the fourth thoracic vertebra posteriorly and the upper 

 part of the first intercostal spaces anteriorly. The plane of 

 the section is 2.1 cm. anteriorly and 2.8 cm. posteriorly 

 below the last section. The anterior margin is 2.3 cm. 

 lower than the posterior. 



S6 



