ANIMAL MECHANICS. 117 



Table XXI. — Friction of Long Flexor Tendons of Birds. 





Friction, &c. 



1. Ostrich, . 



2. Rhea, .... 



3. Jabiru, . 



4. Weka Rail, . . 



5. Silver Pheasant, 



6. Black Swan, 



24.6 per cent. 

 5 2 -4 



56.8 „ 



47-5 



47.4 » 

 3 6 -o „ 



(m.) Reptiles. — The only reptile that I have had an oppor- 

 tunity of examining carefully is the Alligator of the Missis- 

 sippi, from the dissection of which I have obtained the fol- 

 lowing results : — 



Alligator Lucius (long flexors of toes). 



t. First toe, 



2. Second toe, . 



3. Third toe, 



4. Deficiency, . 



Total, 



41.0 per cent. 



29.5 



18.0 



115 



Flexor hall, long., 

 f lexor dig. long., 



Total, 



29-5 pe ;eent. 



70-5 w 



Weight. 

 0.17 oz. av. 



0-54 



If we arrange the animals already described, according to 

 the nature and amount of friction experienced by the tendons 

 of the long flexors of their toes, we shall obtain the following 

 results : — 



