»» MATERIALS FOR A MEMOIR OX 



the stroke is in correlation with a disposition for one or more of 

 the tarsal elements of the outer series to secure junctures — i.e., 

 junctures not accounted for in the plan of the parts — with one or 

 more elements of the median series. Relatively few genera resist 

 this disposition. 



In the manus, the lateral series remains intact, but in a few ex- 

 tant genera and in some extinct genera the outermost of the median 

 series is seen to articulate with a carpal element which lies to its 

 inner side. 



Deviations of the Trunk with Respect to a Hypothetical Longitudi- 

 nal Axis. 



An interesting series of comparisons can be instituted betw'een 

 the anterior and the posterior parts of the trunk in the various 

 positions of the limbs. In illustration of this subject attention is 

 directed to the deviations of the trunk in advance of the rump 

 with respect to a line drawn horizontally forward from the base 

 of the tail. Assuming that the beginning of such a line corre- 

 sponds to the part which shows the least motion and passes to 

 that which shows the most, it will follow that the fore part of the 

 trunk, together with the whole of the regions of the head and the 

 neck, will shift positions with respect to this line. In series 675 

 the figures of the hog demonstrate that the body in advance of 

 the rump are highest when the animal is resting on both hind 

 feet. It is next highest when the animal has come down one 

 fore foot. In the deer, when propped on the fore limbs, the animal 

 sinks so low anteriorly as to permit the horizontal line to intersect 

 the muzzle. The fact that the baboon exhibits no contrast of 

 the kind named would lead to the conclusion that the clavicle 

 prevents the fore part of the trunk from sinking, — a conclusion 

 which is invalidated by the fact that the elephant shows a similar 

 exemption. 



Relation between the Oblique Movement across the Foot and the 

 Number of Toes. 



From the fact that the outer border of the foot first strikes the 

 ground and that the inner border last leaves it, one can create a 

 proposition to which the following facts are corollary. (See pp. 

 42, 50.) 



