139 



for the digastric during the formation of the compo- 

 site spine. 



As the left anterior winding line enters the " bi- 

 composite spine" formation, the revolution out- 

 ward of the left digastric is completed, and its loop 

 goes to the extreme rear hmit of its rear movement. 



At the formation of the composite spine, in the 

 right posterior winding line, the action of the right 

 digastric, turning outward from above, beginning- 

 with its posterior end, which really represents the 

 socket movement, becomes transformed, (§ 39) as 

 to effect, into the left digastric-turning inward^ 

 beginning at the rear. 



§ 134. The movement of the left hindfoot in 

 appui, following the left lower lung lobe, corres- 

 sponds with the movement of the left (its collateral) 

 digastric, so long as the composite spine is form-- 

 ing. But, so soon as the bi-composite spine forms 

 and the right fore-leg comes into correspondence 

 with the left (its diagonal) digastric, this leg sub- 

 stitutes itself for the digastric in the connection tvith 

 the left hind if the movement penetrates the neck 

 root joint.* 



* There are some movements, notably, the walk, in which it seems 

 to us, that the neck root joint shirks more or less of its full actions. 

 <See § 146), 



