PAGE. 



Progression— From the position of ready to discharge 65 



Progressive locomotion, how secured 184 



Psoce muscles Ill 



Pubis bones— A continuation of the breast bone 79 



Baabe, Capt.— His theory of the walk in man (note) 103 



Reflected action of secondary section of posterior lines 117 



Retrogression 45-65-163-164 



Resume' of snake's movement 61 



" of chief points in locomotion and halting 182 



RestiUs which may ensue on position of readiness to dis- 

 charge 64 



Rein, Pressure of on side of neck 263-286: 



Rearing 274 



Rib collects spring 44 



Ribs of snake 42 



" *■' How double twisted 43 



Ribs Slip at articulations 45 



" How correspond with raovemements of head joint. . . 46 

 " How affected as to their bearings by the winding 



lines 51-52-53 



" Respective roles of those on the anterior and pos- 

 terior part of a convex 56. 



" On concaves do not change facings until the spinal 



curves change 37 



•' Proportion of in higher animals 76 



" True and false 80 



" Proportion of false to true in several animals 81 



" How assigned to the CC 82 



Riding — How different from personal locomotion 252 



" Why rider leaves his horse 251 



" Right shoulder forward,'''' in riding agi-ees with 25& 



8 Least number of vertebrae which can constitute. . . 84 



Definition of 2a 



SSS Nomenclature 83 



" "Why three are required in higher animals 82 



Sacrum 79^ 



Saddles 257 



Scutce of snake— Their action 60 



Sections of winding lines, primary and secondary 29 



Seeger, Herr 27(i 



Seat of rider over lungs of horse 252 



Seat bone pressure— Its, action 261 



Setting-up 182 



" " Tables of on the ophidian action 194 



" " Remarks 20S 



