128 PHYSIOLOGY CHAP. 



papillae, much more numerous and smaller, are disseminated all 



3 h 



n< . 52. Semi- diagrammatic dia\\iim of section of a fimgilorin papillae , and four conical 



papillae '', of mouse'-, tongue (Knsaii ami I'anasci); c, taste-tmds ; </, fibres of deep nerve 

 plexus ; 6, group of nerve-cells ;/, teiminal lusit'im swellings. 



over the dorsal surface of the tongue, but are more numerous and 



FIG. 53. Semi-diagrammatic drawing of circumvallate papillae of mouse. (Fusari and Panasci. ) 

 The taste-buds and sustentacular cells of different shapes are shown round the depression A ; 

 the different forms of nerve-endings in buds and epithelium are shown round depression B. 

 a, central nerve bundle ; b, plexus of papilla ; c, plexiform nerve bundle running to serous 

 glands ; d, lateral nerve bundle cut across ; e, granules ; /, nerve-plexus of granules ; o, nerve- 

 cells ; /(, i, sustentacular cells of taste-buds ; /, m, peribulbar nerve networks ; n, fibres of 

 buds dividing and ending in tufts ; o, inter-epithelial nerve-endings ; p, terminal fusiform 

 ramifications. 



run together at the tip and sides ; the conical and filiform 



