148 



a'^. Continued action of the ophidian line works 

 still fnrtlier on neck root joint; the left head con- 

 dyle, in consequence, rotates forward, so as to pass 

 its inteiior side against the interior side of its sock- 

 et, resisting the movement toward the left coming 

 from the right fore-leg, and carrying its own point 

 of pressure forward ; thus corresponding to a* 

 § 37. The rear portion of the left digastric rolls 

 outward, the loop moving to its utmost rear limit. 

 The left fore-foot is carried forw^ard. 



The movements a' a'^ of the left head con- 

 dyle are made on the rear C of the right lung tip, 

 and the hicomposite spine for the " anterior line " is 

 completed in the formation of its front part by (in. 

 this case left) side of the lower jaw setting, in its 

 socket, so as to rest on the inner part of its con- 

 dyle. This bearing, and that on the outer side, are, 

 respectively, analogically the same as the outer and 

 inner bearing of the ribs and feet ; we shall, there- 

 fore, name them the analogical outer and inner 

 bearings of the lower jaw. 



§ 143. B. It is a little difficult to describe 

 the action of the posterior windmg-line as it 

 covers the precedently established diagonal an- 

 terior line. Its secondary section working in the 

 anterior C, is there opposed by the primary sec- 



