742 



4830. The lower jaw. 



The fifth lobe of the last molar is a small tubercle. 



- 



4831. The third and fourth cervical vertebrae. 



They show the concavo-convex articular surfaces of the centrum by which the interlocking 

 joints of these vertebrae are effected, and the large size of the zygapophyses. The pleurapo- 

 physial tubercle is developed from the transverse process of the fourth vertebra. 



4832. The sixth and seventh cervical vertebras. 



They show the long, slender, backwardly-produced pleurapophyses of the sixth vertebra 

 and the simple diapophyses of the seventh, which are grooved below by the vertebral artery. 



4833. The first dorsal vertebra. 



It shows the articular surfaces for the heads and tubercles of the first pair of ribs, and the 

 accessory, or metapophysial, tubercle upon the diapophysis. 



4834. The ninth and tenth dorsal vertebrae. 



They show the second accessory, or anapophysial, tubercle upon the diapophysis, and the 

 eversion of the posterior zygagophyses which characterizes the tenth dorsal. 



4835. The eleventh and twelfth dorsal vertebras. 



They show the divarication and increase of development of the metapophysis and anapo- 

 physis : the diapophysis is still recognizable as a small ridge upon the twelfth dorsal. 



4836. The first lumbar vertebra. 



It shows a marked increase of the diapophysis, which is developed to an equality of length 

 with the met- and an-apophyses. 



4837. The second to the seventh lumbar inclusive. 



They show the progressive increase of the diapophyses and decrease of the anapophyses. 



4838. The sacrum. 



It consists of three anchylosed vertebrae. The first two support the articulations with the 

 iliac bones. 



