112 



ANIMAL MECHANICS. 



Giant Kangaroo {long flexors of toes). 



1. First and second toes, ... 7 per cent. 



2. Third toe, 75 



3. Fourth toe, 18 „ 



100 



Fl, hall longus, ) Weight. 



c, 7. 7 conjoined, 100 . 2.01 oz. av. 



rl. dig, longus, ) J 



Friction, fyc, .... o . 



100 



Wallaby Kangaroo {long flexors). 



1. First and second toes, . . . 7 per cent. 



2. Third toe, 65 ,, 



3. Fourth toe, ... . . 27 „ 



4. Deficiency, 1 „ 



Fl. hall, long., ) Weight. 

 Fl. dig long., j c ™j oined > • ™° i.2 4 oz.av. 



In the Giant Kangaroo the deep tendons have exactly the 

 same cross section before reaching the heel, as when distri- 

 buted to the toes ; and in the Wallaby Kangaroo the difference 

 of cross sections representing friction is only ^ or i£ per 

 cent. 



In the Phalanger, the fl. dig. long, muscle is fourteen times 

 the weight of the fl. hall, long, muscle, and is distributed, 

 sometimes to all five toes, and sometimes to the outer four only. 

 The fl, hall, long, is inserted into the back of the scaphoid 

 bone. 



