OF THE TONGUES OF THE MAMMALIA. 



513 



The Fungiform Papillce (text-fig. 47 A & B) form a dorsal 

 bounding zone on which they have the usual arrangement, and 

 the apical cluster is very well-mai'ked. They form a single row 

 on the inferior surface. They are all prominent, smooth, and 

 hemispherical, and none are overlapped by conical papillse. 



The Conical PapillcB (text-fig. 47 A & D) have the usual 

 arrangement in clusters and rows of varying degrees of obliquity. 

 The vertical direction of the rows on the lateral borders can only 

 be made out by very careful examination, however. All belong 

 to the filiform series. 



ff^ 





■ The tongue of Pithecia satanas. 



The Lateral Organs (text-fig. 47 E) form triangular or concave 

 bodies on the sides and inferior surface, and the lateral vallate 

 papillfe are level with the apex. Several of the pointed lamina? 

 have secondary sulci. The right organ is -9 cm. long, and has 

 5 lamina? and 6 sulci. The left organ is -8 cm. long, and has 

 4 laminae and 5 sulci. 



The Inferior Surface (text-fig. 47 B).— The broad hoimcling 

 papillary zone is wide, and has papillfe disposed in the usual 



manner. 



Thefrenal lamella is a long plate with rounded apex, and the 

 orifices of the Wharton's Ducts open on the ventral surface near 

 the base (text-fig. 47 B, a). 



The ventral mesial sulcus is wide and deep, and the frenum is 



short. . T, /A\ 



Mayer described a vallate triangle m P. satanas (4). 



