158 



development is in close counter-action with the 

 neck S and the latter after the formation of the 

 ophidian part, developes the bi-composite spine 

 for the line by the final thorough movement of the 

 condyles. 



§ 145. Eeferring to § 141 for the symbols used, 

 ive should form the pace by the following combina- 

 tion : 



A a^. The left head condyle revolving at its pos- 

 terior end, independently of any preceding ophidian 

 movement, throws the weight on to the left fore-leg 

 by its neck connection ; and the left sterno-mastoid 

 muscle turning outward by the movement imparted 

 to the left upper comer of the sternum, through 

 the formation of the left convex in the posterior C 

 of the neck S, turns the left fore-foot on its outer 

 bearing. This working is, in the horse, directly as- 

 sisted by the Levator humeri muscle (§ 86, note*). 

 There wiU also be a certain effect in throwing the 

 left hind-foot on its outer hearing. 



a'^. The left-head condyle passes its interior 

 side against the interior of its socket. If the left 

 fore-foot were fi'ee this would carry it forward, 

 but this foot being fixed, the traction of the sterno- 



* Were the foot in air, the drawing of this muscle would bond the 

 3eg; being in appui, the straightened leg draws on the neck. 



