96 



DEVELOPMENT OF THE XOSE, 



Fig. 112. HEAD OF AN EMBRYO STILL MORE ADVANCED IN DEVELOPMENT. (His.) 



A, from above ; B, roof of mouth after removal of lower jaw ; i.m, placed on the fronto-nasal 

 process and just above its intermediate depressed part; l.n.pr, lateral nasal process; m.n.pr, mesial 

 nasal process ; the other letters as before. The nasal laminae of the globular processes and the 

 palatine projections of the maxillary processes are seen in B. 



Fig. 113. HEAD OF AN EMBRYO OP ABOUT SEVEN Fig. 114. HEAD OP AN EMBRYO MORE ADVANCED 



WEEKS. (His.) IN DEVELOPMENT, WITH THE PARTS OP THE 



NOSE AND MOUTH BEGINNING TO ASSUME THEIR 



The external nasal processes have united with the PERMANENT RELATIONSHIPS. (His. ) 



maxillary and globular processes to shut off the 

 olfactory pit from the orifice of the mouth. 



point of the nose, and the triangular surface above it the bridge ; the ala3 nasi are 

 formed by the lateral nasal processes. These processes are less prominent than the 

 mesial (fig. 112). They curve round the olfactory depressions, and meet the maxillary 



