PLATE IV 
EXPLANATION OF FIGURES 
13. Wax reconstruction of gastric glands of stomach. Humanembryo of 240 
mm., embryo 186. X 267. 
14. Same at birth, embryo 341. X 267. 
15. Wax reconstruction of epithelium of upper part of duodenum. Human em- 
bryo of 22.8 mm., series 871. Showing beginning villi and duct of the dorsal pan- 
crease. X 89. 
16. Wax reconstruction of epithelium of lower part of duodenum. Human em- 
bryo of 22.8 mm., series 871. Showing vacuoles and occlusion of lumen. X 89. 
