140 THE THIRD DAY. [CHAP. V. 



become united by solid outgrowths ; the latter as a single 

 diverticulum also from the duodenum. 



12. The changes in the protovertebrse and the appear- 

 ance of the muscle-plates. 



13. The appearance of the cranial nerves in the meso- 

 blast adjoining the hind brain. 



14. The change in position of the Wolffian duct. 



