OF THE TONGUES OF THE MAMMALIA. 



119 



intervening laminse termed foliate papillce, or, more properl}^, 

 lateral organs. In this series of papers they will be described as 

 such. 



The Circumvallate Papillce. 



The circumvallate papillje, also known as the fossulate or wall 

 papillae, or, briefly, vallate papillae, vary in number from one to 

 twelve, and the numbers may vary in diflferent individuals of the 

 same species. They are the largest and, in most cases, the fewest 

 in number of all the papillae. They are usually disposed in a, 

 single row on each side, but there are two in the Binturong. In 

 the Capybara they appear as slits and ridges. 



Text-figure 9. 



r£U/V£ oouifoucouu SLMCK HOWLCe C£RCOPITH£QU£S TREE KANGAROO 



MOSKE y 



Blf^TURONG CAPYBARA 



The different types of arrangement of the circumvallate papillge. 

 Details in text. 



Arrangement. — "When there is only one papilla, it lies in the 

 mid line ; wdien there are two, there is one on each side, and 

 they are described as right and left lateral, the tongue being 

 held with the apex away from the observer. If there are three, 

 the}^ are grouped in the form of a triangle, and the individuals 

 are described as the posterior and right and left lateral papillae. 

 In most cases the apex of the triangle is posterior, but in the 



