Landacre, Taste Buds of Jnieniriis. 



17 



functional needs of the organism, /. e., in the appearance of the 

 buds simultaneously on areas where they could be stimulated at 

 the same time, that we shall have to look for an explanation of 

 the place of appearance and manner of spreading of the various 

 groups of buds. 



TABLE rv. 



Table showing the extent of the oral, cutaneous and pharyngeal groups given in sections of 7 microns each. 



*The opercular buds catalogued in Table VIII, C, for the 9.4 mm. embryo (U) are not included in 



this summary. 



The relations of these groups to each other and particularly 

 their limitations are shown in Table IV, where the anterior and 

 posterior boundaries of the groups are given in sections of 7 mi- 

 crons each. From this table it will be seen that the isolation of 

 the oral and pharyngeal groups is quite marked in the earlier 

 series and even up to series R they do not overlap, but in this 

 series the two groups overlap. Those of the oral group occupy 

 the roof and dorso-lateral portion of the palate and extend pos- 

 teriorly beyond the anterior end of the pharyngeal buds which 

 occupy the floor and sides of the pharynx. 



In the regions in which the overlapping occurs the oral group 

 includes in this table all buds of the anterior and posterior pala- 

 tine groups, the latter including the proximal hyoid and suspen- 

 sorium buds. All these groups have a certain degree of contin- 



