358 



THE SENSES 



Upper surface of the tongue. 

 FIG. 211 



CIRCUM- 

 VALLATE 



PAP1LUE 



a 



A taste-bud from the circumvallate papillae of the tongue: a, surface stratified epithelium; 

 6, lower layers of the same; c, sensory cells surmounted by delicate hair-like processes; d, sup- 

 porting cells. (Bates.) 



