98 



MR. R. I. POCOCK ON THE EXTERNAL 



the hallux. I believe the Marmozets to be specialised Cebidje, 

 derivable from them by reduction in bodily size, by the loss of 

 the third molar above and below, and by adaptation of the hands 

 and feet for holding to the roughnesses of bark in the way 

 above described. 



Text-figure 4. 



A. Kiglit hand of CalUmico goeldii, adult, approx. nat. size. 



B. Right foot of the same. 



C. Right hand of Saimiris sciurea, adult. X 3. 

 L). Right foot of the same. X j. 



E. Right hand of Callicebiis muloch, young. X 3. 



F. Right foot of the same. 



The hands and feet of CalUmico need no detailed description, 

 since they resemble in all important points those of IlcvpaU or 

 Mystax. (Text-fig. 4, A, B.) 



