734 



APPENDIX N 



Walk. A method of progression, common to nearly all the terrestrial 

 vertebrates, which is effected by a regulated succession of limb-move- 

 ments, as described below. 



If, in the quadrupedal walk, the notation begins with the landing of a 

 right hind foot, the consecutive foot fallings will be the right fore foot, 

 the left hind foot, the left fore foot, followed by its diagonal hind, with 

 which the record began. The time intervals of foot-fallings vary with 

 different species of animals, but their sequence is invariably the same 

 with all the apes alone excepted, with which the landing of a hind foot 

 is usually preceded by that of its lateral fore foot. During a single stride 

 of a quadruped in an ordinary walk it is supported in eight different 

 ways : twice upon the laterals ; twice upon the diagonals ; twice upon 

 two hind feet and one fore foot ; and twice upon two fore feet and one 

 hind foot. 



" It is thus seen that when a horse during a walk is on two feet, and the other two feet are 

 suspended between the supporting legs, the suspended feet are laterals. On the other hand, 

 when the suspended feet are severally in advance of and behind the supporting legs, they are 

 diagonals. These invariable rules seem to be neglected or entirely Ignored by many of the 

 most eminent animal-painters of modern times." EADWBARD MUYBRIDOE, On the Science of 

 Animal Locomotion, p. 8 [R. I. ox. BRIT.]. 



10 



K2L 



FlG. 62. Some Consecutive Phases of the Canter. 

 The stride is complete at 10, and 11 and 12 are reproductions of 2 and 3. 



Canter. A system of quadrupedal locomotion in which the feet are 

 landed on the ground in the same consecutive order as in the walk, but 

 not with the same comparative intervals of time (See WALK.) 



Assuming that in the canter the notation is begun after a propulsion 

 through the air with a final thrust by the left fore foot, the landing will 



