SECOND MONTH 



87 



124). Between the mesial processes there is a depressed area on the frontonasal 

 process. In the fifth week an angular projection appears on this area, which 



FIG. 119. EMBRYO OF 7'5 MM. (LETTERED 

 A) TWENTY-SEVEN TO THIRTY DAYS 



OLD. (His.) 



FIG. 120. EMBRYO OF 9'1 MM., THIRTY-ONE TO 



THIRTY-FOUR DAYS OLD. (His.) 



FIG. 1-21. EMBRYO OF 15*5 MM. (NECK- 

 BREECH LENGTH) ABOUT THE BEGINNING 

 OF THE SIXTH WEEK. (T. H. Bryce.) 



This embryo was obtained in a uterus 

 removed for a large fibroid tumour by Dr. 

 Oliphant, Glasgow, and fixed in situ with 

 sublimate solution immediately after the 

 operation. It may be considered perfectly 

 normal. 



FIG. 122. EMBRYO OF 30 MM. ABOUT 

 THE BEGINNING OF THE THIRD 

 MONTH OR RATHER EARLIER. 

 (T. H. Bryce.) 



(This embryo was fixed in situ.) 



afterwards forms the tip of the nose, while the area above it later forms the bridge. 

 The mesial processes enlarge, and the maxillary processes grow forwards to 

 meet their outwardly curving ends. The mouth is thus reduced to a narrow slit. 



