40 



Journal of Comparative Neurology a7id Psychology. 



they increase, as shown in Table XI, and are very numerous in 

 the 20l mm. embryo. 



TABLE XI. 



Table showing the number of taste buds in the anterior palatine group and the limits of their 

 distribution expressed in sections. 



It will be seen from the table that the areas occupied as rep- 

 resented by sections are quite constant, ranging from sections 

 43 to 58 for the anterior boundary and from 65 to no for the 

 posterior boundary. After the number of buds increases be- 

 yond four, the posterior limit of this group moves back slightly, 

 but up to this time there is undoubtedly little or no spreading 

 in this group. The posterior limit of this group in U brings it 

 into contact with the anterior buds of the posterior palatine group. 



10. THE POSTERIOR PALATINE GROUP. 



This group consists of (A) buds lying on the posterior wide 

 palate, (B) on the proximal parts of the hyoid arch and (C) on the 

 suspensorium, 1. e., the hyom.andibular, quadrate and symplectic. 

 This group, like the preceding, is innervated by a single nerve, 

 the ramus palatinus posterior VII. 



This group is isolated when it first appears from other groups 

 on the roof of the mouth in position, there being 40 sections 

 between the posterior limits of the anterior palatine group and 

 the anterior buds of this group and about ten sections between 

 the posterior buds of this group and the buds on the roof of the 

 pharynx in the region of the first gill arch. 



