ANIMAL MECHANICS. 



125 



Spider monkey, owes its scientific name to this circum- 

 stance. 



The following observations show the relative cross sec- 

 tions of the flexor tendons of the hand in several of the New 

 World monkeys. 



3. Spider Monkey (deep flexors of fingers). 



Flexor dig. prof., . . 



100 



1. Second finger, . . . 



18.4 per cent. 



2. Third finger, . . , 



20.4 „ 



3. Fourth finger, . . 9 



20.4 ,, 



4. Fifth finger, . . . 



14.3 n 



5. Deficiency, . . . . 



26.5 



Total, 



IOO. O 



. Negro Monkey (deep flexors of fingers). 



Flexor dig. prof., 



IOO 



1. Five fingers, . • . 



72.6 per cent. 



2- Deficiency, . . . . 



27-4 „ 



Total, . . . 



100.0 



Capuchin Monkey (deep flexors of fingers). 



Flexor dig. prof., 



IOO 



1. Five fingers, 



64.7 per cent. 



2- Deficiency, . 



35-3 » 



- Total, . . . 



100.0 



