ANIMAL MECHANICS. 



95 



In these animals we may observe a concurrence in action 

 of the first and fifth toes, like that which takes place between 

 the first, third, and fourth toes, in the monkeys of the Old 

 Continent. 



The relative strengths of the flexor tendons in the Negro 

 monkey were found to be — 



Lagothrix Humboldtii. 



1. Flexor hallucis longus, . . 49 per cent. 



2. Flexor digitorum longus, . 43 „ 



3. Accessorius, 8 „ 



Total, .... 100 



1. First toe, 18.5 per cent. 



2. Second toe, 18.5 ,, 



3. Third toe, 25.0 „ 



4. Fourth toe, 19.5 



5. Fifth toe, 18.5 „ 



Total, . . . 100.0 



In the Hapale or Jacchus, the flexor hallucis supplies the 

 third and fourth toes only, so that its human name becomes 

 inappropriate ; and the flexor digitorum supplies the second 

 and fifth toes, with a small slip to the hallux. 



(e.) The Carnivores. — In most of the Carnivores, the hal- 

 lux is wanting, and in all of them the flexor hallucis, and flexor 

 digitorum, instead of being distributed separately to the dif- 

 ferent toes, are united into one tendon (into which also the 

 accessorius is inserted), which is afterwards distributed to all 

 the toes, generally four in number, but which may be five or 

 occasionally six in number. 



