/ owest observed value 



Algebraic sum 



oj deviations oj highest 



and lowest observed values 



S1.0 



-17.8 



-1.72 



+3.4 



+0.33 



S\ mmeti ical 



-2.10 



-1.83 

 -2.52 

 -2.74 



-2.13 



P 



-2.25 

 -2.36 

 -2.75 



-2.43 

 -2.73 



± Symmetric .il 



± Symmetrical 



Slightly positively skewed 



Slightly negatively skewed 



± Symmetrical 



± Symmeti ii .il 



± Symmetrica] 



SlightK positively skewed 



± Symmetrical 



Symmetrical 



Slightly positively skewed 

 Slightly positively skewed 



5 females. The pooled data give a sample of 21 capacities for H. agilis 

 of both sexes. The combined sample mean, as given by Schultz (1933), 

 is 98.8 c.c, and the combined sample range is 81 to 120 ex. These figures 

 are used as a basis for a further series of Hylobates entries in Tables 4, 

 9, and 12. The distribution in H. agilis, as Table 12 shows, is virtually 

 symmetrical. 



It became clear that Vallois's cited data for 40 siamang (Symphalangia 

 syndactylus) were those of Oppenheim (n = 26) together with those of 

 Schultz (n = 14). From the original references (Oppenheim 1911-1912; 



53 ^ 



