512 



DR. C F. SONNTAG OX THE ANATOMY 



and has 5 laminpe and 6 sulci. The left organ is "8 cm. long, and 

 has 4 laminfe and 5 sulci. 



The Inferior Surface (text-fig. 46 B). — The nairow ventral 

 papillary zone has irregularly disposed conical papillfe and a single 

 I'ovv of discrete prominent fungifoiin papillte ; the latter are most 

 numerous and closest together round the apex. 



Text-fiffure 46. 



/^T°^ 



P/an. 



Elevat/on. 



....r\ f — \ 



surface of ^- 



J£i^ 



/<Wf^ A ft n ^^ T^nnA.. 



Tlie tongue of Aotus feJinus. 



The f renal lamella is triangular. It has a bifid apex and plain 

 sides. The veiii7-al mesial sulcus is shallow and deep, and the 

 frenum is of moderate length. 



Genus PiTHECIA. 



The Black Saki {P. satanas). 



The specimen which I examined was preserved, so no measure- 

 ments were made. 



The tongue has almost parallel sides, and the apex and lateral 

 borders have the usual characters. The thickness rapidly 

 diminishes from frenal lamella to apex. 



The Circumvallate PapiUce (text-fig. 47 A & C). — The vallate 

 papillfe form an isosceles triangle Avith the apex behind. All are 

 slightly retracted, with granular surfaces, the fossie are well- 

 marked, and the Valiums are nodulated. 



