ANIMAL LOCOMOTION. 



73 



lateral heterochiiy in Figs. 10, 11, 12. The fifth toe of the right 

 hind foot is here seen to extend horizontally. The change to 



(Fig. 3 of sekies 



(Fig. 4 of series. Seep. 50.) 



(Fig. 1"2 of series.) 



diagonal heterochiry is made in Figs. 13, 14 (which are repetitions 

 of Figs. 1, 2, 3), and a stride is completed. The animal now 

 alters its gait from heterochiry to synchiry. Fig. 15 is the form 

 of transition. In Fig. 16 the change has been completed and the 

 animal is sustained alone by both hind feet. He maintains this 

 position in Fig. 17, but again is in a transition form of three legs 

 on the ground in Fig. 18. 



