THE ANATOMY OF THE TONGUES OF THE MAMMALIA. 4'.)7 



27. The Comparative Anatomy of tho, Tongues oE the 

 Mammalia. — IV. Families 3 and 4. Cebidpe and Hapa- 

 lidse. By Charles F. Sonntag, M.D., F.Z.S., 

 Anatomist to the Society. 



[Received April 15, 1921 : Eead May 24, 1921.] 



(Text-figures 37-52.)* 



Contents. 



rage I Page 



Introduction 497 [ Genus Caeajao 514 



Family Cebidse 497 ! Genns AJouatta 515 



Pigmentation 497 < Summary 516 



Genus Cehus 498 Family Hapalidse 517 



Genus Ateles 502 Genus Hapale 520 



Genus LagotJirix 506 Genus Leontocehus 520 



Genus Saimiris 509 ', Genus 3Ii/stax 523 



Genus Callicebus 509 | Genus CEdipomidas 523 



Genus J o^MS 511 Summary 523 



Genus Fithecia 512 j Bibliography :,. 524 



Introduction. 



The literature of the Cebidae and Hapalidfe contains several 

 papers on the tongues of Cebus, Ateles, and Gallithrix (=IIa2xde), 

 I)ut few on those of other genera. The objects of this paper, 

 which is based on fifty-five specimens, are to supplement existing 

 accounts, and describe several tongues for the first time. 



The tongues of the Oebidce and Hapalidse resemble those of the 

 Cercopithecidse in the characters of the apex and lateral boi'ders ; 

 and they agree with them in that the foramen caecum, lytta, plicae 

 fimbriatee, and apical gland of Nuhn or Blandin are absent. 



I have given the measurements of fresh specimens only, for a 

 list of the dimensions of j^reserved ones is worthless. 



I have employed Pocock's nomenclature (12) for the Hapalidse. 



Family C E B i D ^. 



Pigmentation. — Many of the tongues of the Cebidte are 

 pigmented, and the colour is evenly distributed over the entire 

 dorsum, or arranged in a definite pattern; on the inferior surface 

 it covers the parts around the frenal lamella which, as a rule, is 

 colourless. The vallate and fungiform pnpillaj may be colourless 

 or pigmented. 



If several specimens of each pigmented species are examined it 

 will be seen liow the distribution of the pigment varies greatly, 

 so the colour is of no value for purposes of classification. 



* The explanation of the lettering of the Text-figures is given in the text. 



34* 



