114 



ANIMAL MECHANICS. 



2. Rhea (long flexor tendons of toes). 



1. First toe, . . . 22.1 percent. 



2. Second toe, . . 45.1 



3. Third toe, ... 32 8 ,, 



Total, 



1. Flexor hall, long., 



2. Flexor dig. long., . 



3. Friction, $c, . 



Total, . 



17.3 per cent. 



3°-3 

 52.4 



Weight. 

 0.75 OZ. 

 2.09 „ 



3. Jabiru. — In this bird, which is celebrated for its power 

 of standing on one leg for a long time, the tendons of the fl. 

 hall. long. and^. dig. long, do not unite until they reach the 

 sole of the foot ; the fl. hall. long, flexes the four toes, 

 and the fl, dig. long, flexes the second, third, and fourth 

 toes only. 



Jabiru {long flexors of toes), 



1. First toe, 17 per cent. 



2. Second toe, .... 23 



3. Third toe, 37 



4. Fourth toe, .... 23 „ 



Total, ... 100 



1. Flexor hall, long., 



2. Flexor dig. long., 



3. Friction, Sfc, 



12.3 per cent. 



3°-9 » 

 56.8 



"Weight. 

 0.07 oz. av. 



0.18 „ 



Total, 



