EMBRYOS OF THIRTY-EIGHT DAYS. 



153 



FIG. 103. HUMAN EMBRYO OF 16.0 MM. 

 SERIES 1128. X 5 diams. 



FIG. 104. HUMAN EMBRYO OF 17.8 MM. 

 SERIES 839. X 5 diams. 



A B 



FIG. 105. HUMAN EMBRYO OF 18.1 MM. SERIES 1129. X 5 diams. 



