OF THE TONGUES OF THE MAMMALIA. 289 



the usual rlirections. The papillary bodies are flat or cj'lindrical, 

 and the number of points per pajoilla varies. 



Glands and Lymphoid Nodxdes (text -fig. 19 A, a). 

 At the sides of the epiglottis there are prominent nodular 

 masses with a few minute orifices of gland-ducts and pits. 



The Lateral Organs (text-fig. 19F&G). 

 The lateral organs lie on the lateral borders (l.b.) and inferior 

 surface. They consist of short, broad, furrowed lamicte separated 

 by short, wide sulci. The laminfe do not project (text-fig. 19 G). 

 The right oi-gan is 1-45 cm. long, and has 9 laminae and 10 sulci. 

 The left organ is 1*3 cm, long, and has 7 laminte and 8 sulci. 



The Frenal Lamella (text-fig. 20A&B). 

 The apex is entire and reaches a point 3 mm. from the apex of 

 the tongue in my adult specimen, and 2 mm. in my young one 

 It is pointed or rounded. The edges reach as far back as the 

 middle of the latei'al organs. 



THE PATAS GROUP. 



Species examined : C. patas ; C pyrrhonotus . 



The Patas Cercopitheque {C.p)tttas). 

 Habitat : "West Africa. 



Three specimens were examined, and the following measurements 

 refer to the largest one: — Total length 4*8 cm.; length of the 

 oral part 4"3cm. : length of the pharyngeal part "5 cm.; width 

 between the lingual attachments of the palato-glossal folds 1'9 cm. 



In two examples the tongue is yellowish-brown in colour, but 

 in one it is unpigmented. The ajjex and lateral borders are 

 similar to those of the preceding forms, except that the apex has 

 a median notch as in C. mona. There is no median dorsal sulcus, 

 and the structures mentioned on page 278 are absent. 



The Circumvallate Pajnllce (text-fig. 21 A & F to I). 



Three papillary patterns are present in my three examples :— 



Sp)ecimen No. 1. — The three vallate papillae form an isosceles 

 triangle with an acute vertical angle. All are prominent, 

 especially the posterior one ; they ai'e circular on plan and conical 

 on elevation, the broad ends of the cones projecting beyond the 

 Valiums (text-fig, 21 A, H, & F). All have granular surfaces. 



The vallate area contains several prominent fungiform papillse, 

 and is roughened by conical papillae. 



Specimen No. 2, — Four vallate papillae form a Y. On the left 

 limb, including the posterior papilla, there are three, but the right 

 limb has only two (text-fig, 21 I). The mid left papilla is small, 



Specimen No. 3. — Six papillae are arranged in the form of a V, 

 ^ach limb of which has three elements. The most antei^ior 



