PLATE X 



Plate X is from the upper surface of a section through 

 the upper third of the body of the seventh thoracic verte- 

 bra posteriorly and the lower part of the third intercostal 

 space anteriorly. The plane of the section is 1.3 cm. anter- 

 iorly and 3.2i cm. posteriorly below that of the last section, 

 making the anterior margin of the section .9 cm. lower than 

 the posterior. 



92 



