Species 

 Chimpanzee 

 Gorilla 

 Orangutan 

 Man ("mixed 

 stock") 



Mean at intermediate Mean at adult age 



age— "stage c" (in c.c.) —"stage d" (in c.c.) 



(males arid females) (males and females) Percentage 



375 39° 97(96-i) 



490 510 96 



385 400 97 (96.25) 



1230 



1320 



93 



Thus, for all 3 of the great apes, the value is 96 per cent, whilst for 

 man it is somewhat lower, namely 93 per cent. 



Schultz (1965) has used an intermediate category designated "Juvenile 

 II," which is identical with' that of Ashton and Spence; that is, it is the 

 last subadult category. Furthermore, although the samples are of limited 

 size, he has separated the sexes and quotes figures for each alone. His 

 percentages are as follows: * 



A summary of the data given by Ashton and Spence and by Schultz 

 is as follows: 



Percentages 



From the data given by Selenka, Zuckerman, Ashton and Spence, 

 and Schultz, it would seem likely that if ancient hominids resembled 



• Table after Schultz. 1965, Tables 3, 4, 5, and 6. 



& 70 



