OHC AN OF TASTE IN MAMMALIA. 



•20i 



secondary papillae, ib. A, in which the capillaries diverge an<l 

 divide to form their brush of loops, as in fig. 149, B, receiving 

 each its capillary loop, into the fasciculus of which the branch of 



a and vein v sub- 

 entering the 

 papilla 



or 



the artery 

 divides on 

 mushroom-like 

 process. 



The conical papilla; clothe 

 as in a close-set pile the 

 anterior two-thirds of the 

 dorsum : they are longest 

 at the mid-line near the 

 centre of the tongue, small- 

 est near the sides and 

 at the tip. The cone-form, 

 with secondary papillae down 

 its sides, fig. 150, merges into 

 the cylindrical form, fig. 

 151, with a terminal brush of filaments 

 covering of these, ib. a, b, c, forms 

 tongue, which becomes separated 

 from the deeper layer of epithe- 

 lium, cl. In the conical variety, 

 fig. 150, a is the basal mem- 

 brane, b, c, the ( processes,' sub- 

 dividing into secondary or true 

 papillae, e, the deep layer of 

 epithelium, /, the superficial 

 layer, //, the points from which 

 the filamentary prolongations 

 would have projected : these 

 sometimes resemble fine hairs. 

 The function of such filiform 

 papilla; appears to be ' portative ' 

 and ' protective,' that of the coni- 

 cal papilla mainly e tactile,' that 

 of the fungiform and fossulate 

 ones ( gustative : ' behind the 

 latter are the principal mucous 

 follicles. 



The so-called gustatory branch 

 of the fifth supplies the fungi- 

 form, conical, and filiform papilla? 



150 



Conical paptllse. ocxz>. 



The excess of the scaly 

 the so-called « fur ' of the 



151 



Filiform papiUce. OGXL. 



the glossopharyngeal serves 



