Development of the Nine-Banded Armadillo. 417 



14 



FIG. 14. Ventral view of vesicle No. 18, seen as a semitransparent object. The 

 Trager is covered with scale like villi, which overlap the lower margin of the yolk- 

 sac. This vesicle should be compared with that shown in fig. 12, in which the let- 

 tering is the same. X 5. 



JOURNAL OF MORPHOLOGf, VOL. 21 NO. 3. 



