OF THE TOXGUES OF TUE iMAMMALIA. 523 



All are round and finely-granular, the fossfe are well-marked, 

 and the Valiums are lobulated. 



The Fungiform Fapillce, which ai'e all small but prominent, 

 form a dorsal bounding zone on which they have the usual 

 arrangement in clusters, and rows, the usual number on each row 

 being two. Most of them are equal in size, and are smooth and 

 hemisphei-ical. 



'The Conical Papillce, which are all closely-aggregated, have the 

 usual arrangement in rows and clusters ; they increase in size 

 from without-inAvards, but their increase in size from before- 

 backwards is slight. They take the form of overlapping scales 

 with hair-like processes. 



. Lymphoid Tissue and Glands. — The nodular zone on the base 

 of the tongue is narrow, and no orifices of ducts and pits are 

 visible, even when the tongue is highly magnified. 



17ie Lateral Organs are small and oval : their centi'os are level 

 >vith the lateral vallate papillte. They consist of well-marked 

 primary sulci separating comparatively broad laminae with pointed 

 or rounded upper extremities. The secondary sulci are very thin. 



The right organ is -1 cm. long, and has 3 laminae and 4 sulci. 

 The left organ is -1 cm. long, and has 4 laminae and 5 sulci. 



The Inferior Surface. — The narrow ventral papillary zone has 

 only conical papillae, but is incised by transverse sulci running in 

 from the dorsum. 



The ventral mesial sidcus, which is narrow and deep, opens 

 into a large triangular space, which also receives the short 

 frenum. 



The frenal lamella is triangular, with a bifid apex and fissured 

 lateral boi'ders. 



Genus CEdipomidas. 

 The Pinche Monkey {(E. oedipus). 



Flower (3) described the tongue and gave the following data: — 



1. The tongue tapers gradually. 



2. There is a median dorsal sulcus posteriorly. 



3. The ventral median sulcus is deep. 



4. The fungiform papillce are regular, and cover the entire oral 

 part of the dorsum. 



5. Three vallate papillae form a triangle. 



6. The latei'al orgaus are well-marketl. 



7. The frenal lamella has a dorsal ridge and cleft apex. 



Summary of the l^ongues of the Ha.palida^. 



1. The tongue is either long, narrow, and tapering slowly, or 

 short, conical, and tapering rapidly from a wide base. 



2. Mesial dorsal ridges are frequently present. 



3. The tongue of Mystax tirsidas has a botter-mai'ked mesial 

 dorsal sulcus than those of all other Primates. 



