XI.] 



THE ALIMENTARY SYSTEM. 



439 



line downwards, and then dividing, passes outwards to the 

 gum on each side of the lower jaw. 



Both on the right and left of this fraenum is a little papilla, 

 on which opens the duct of the sub-maxillary gland of the 

 same side. 



FlG. 372. SUBMAXII.LARY GLANDS AND TONGUE-MUSCLES OF GREAT 



ANT-EATER (kiynttKofkagk jubata). 



a. main body of the confluent submaxillary (here subcervical and subpectoral) 

 salivary glands ; c, dilated portion of duct (or salivary reservoir) surrounded by 

 muscle : gh t genio-hyoideus ; my, mylo-hyoideus ; s, prominence of shoulcfer- 

 joint ; sm, sterno-maxillary muscle. 



(After Owen.} 



On the upper surface, or dorsum, of the tongue, are three 

 kinds of small prominences, or papillae. Towards the front 



