115 



sections of the anterior winding-lines throw the 

 ribs on their outer bearings, and again, when the 

 primary sections of the posterior Hnes bring them 

 on their inner bearings ; for the npper lobes, similar 

 moments, with the necessary substitutions as to 

 sections. 



Both these filhngs will, for the ophidian action, 

 be as just stated, but at the time when each move- 

 ment coalesces with the composite spine, the lung tips 

 (§ 112) will accompany the movement of the quasi 

 ball and socket at the root of the neck, so that 

 whenever a connection of the lower C C occurs the 

 lung tips Jill at their upper part from above ; and 

 whenever of the upper C C, at their lower part, also 

 from above. 



The formation of the bicomposite spine tends to 

 straighten the lung filings, destroying the counter 

 turns, and making the whole lung one ; entirely so, 

 when the " superimposition of curves" (§ 71) has 

 place, and approximately so in single diagonal for- 

 mations. 



There is a certain action at the lower edges of 

 the lungs (about the diaphragm) analogous to that 

 at the lung tips, but it seems unnecessary to take 

 this into account. 



