157 



the horse the lateral movement of the lower jaw, 

 as it leaves its outer bearing, supplies whatever is 

 wanting in the similar movement of the diaphragm. 

 In the lion, &c., the long flexible body gives suffi- 

 cient movement to the diaphragm for replacing en- 

 tirely the movement of the jaw. But in the Giraffe 

 there must be an extended jaw movement, to re- 

 place the want of proportional lateral movement 

 of the diaphragm caused by the long neck and 

 comparatively short body. 



When moving with the neck, thefore-limhs are re- 

 lated to the neck S,'^ as the hind-limhs are to the third 

 S, and thus the limb on the side of the rear con- 

 vex of the neck will receive an outer bearing turn, 

 the one on the side of a rear concave an inward 

 bearing turn. This relation will be more ma:^ked 

 when the neck S acts first as in the pace. 



The third S is for the rear luhat the neck S is for 

 the front (excepting so far as the latter is more 

 concerned in forming the bi-composite spine). After 

 (for the pace) receiving its development in the an- 

 terior line by the extension of the neck S, and 

 when this developement has been extended to the 

 ophidian S, the third S commences the formation of 

 the POSTERIOR winding line. From the beginning, its. 



* We would recall the fact of the fore-limbs being head-limbs. 



