432 DR. p. CHALMERS MITCHELL ON LONGEVITY AND 



The large number of Macaque monkeys recorded shows the 

 same low average duration, and the samemarked difference between 

 the average and the maximum duration, although the latter is 

 certainly below the potential longevity. A Common Macaque 

 occasionally deposited temporarily at the Gardens is stated by 

 its owner to be at least 22 years old. It is of significance that 

 the highest average relates to Japanese apes, examples of which, 

 unlike all the others, were housed in a cage exposed to the open 

 air. 



No. of 

 Iiuliv. 



Gynofiihectis niger 9 



(Celebes Black Ape.) 



All Baboons 137 



Theropithectis gelada 2 



Cyriocephalus anuhis 12 



C. hahouiii 19 



C doguera 1 



C. hamadryas 22 



G. ibeanus 1 



C le%ico2^hceus 6 



C mormon 7 



C. neumanni 1 



C. papio 2 



G. porcarius 43 



G. sphinx 21 15 41 



Baboons, on the average, show even a lower duration and a 

 greater diifference between the average and the potential longevi- 

 ties than Macaques. Since the period in question, a number of 

 baboons have been exposed to the air and the average duration is 

 notably higher. 



CebIDJj:. ,^°-.°f .Av.dur. Max.dur. 



Indiv. Ill months. iii months. 



Ghryso thrix sciurea 44 9 108 



(Squirrel Monkey.) 



(7e6i<s, whole genus 226 10 50 



(Capuchins.) 



G. albifrons 33 8'6 20 



G.apella 10 11-8 27 



G. azarce 2 11 16 



G. capucinus 39 7'5 20 



G.fatuellus 58 11-8 50 



G.flavescens 6 8*5 12 



G. hypoleucus 46 8 17 



C.lunatus 9 17 39 



G. mo7iachus 21 14-3 42 



G. vellerosus 1 15 15 



G . versicoloi' 1 31 31 



