CHARACTERS OF THE SOUTH AMERICAN MONKEYS. 



101 



In Cacajao the length of the hand as compared with the foot 

 is about the same as in Gehus ; but in the former genus the 

 pollex is shorter and the interval between digits 2 and 3 is a 



Text -figure 6. 



A. Right hand of Cebus, from below. 



B. Right foot of the same. 



C. Right hand of Lagothri^ infamatus, from l)elow. 



D. Right foot of the same, with abnormal basal webbing between digits 2 



and 3. 



X I approx. 



little greater than between 3 and 4 or 4 and 5, thus foreshadow- 

 ing the more marked inequality in spacing that obtains in 

 Alouatta and Lagothrix, (Text-fig. 5, A, B.) 



