17G 



MEMOIRS OF THE NATIONAL ACADEMY OF SCIENCES. 



Out of 28 skulls showinji' the lateral posterior depression, 19 arc flattened on the left side and 

 9 oil the right. These defoniiitios are illustrated in Figs. 29 and 30, which represent superimposed 

 outlines adjusted on the inedian line and the maximum occipital point. 



Thus we see that the slculls flattened on the left side are twice as many as those flattened on 

 the right. Right-handed women carry the child usually ou the left arm, and therefore suckle it 

 mostly af the left breast,* and right-handed people predominate greatly over the left-handed in all 



/9 //'/ 



Fio. 28.— Occipital depresi 



races. When lying on the hard cradle-board, then, the heads of the great majority of infants should 

 more fi-eciuently incline to the right than to the left, and should therefore, we would suppose, be 

 more likely to become flattened on the right side. In our mound skulls the flattening is much 

 more frequent on the right side than on the left, in the proportion of 62 right to 39 left in 101 

 skulls in which lateral posterior flattening is'found. 



• John A. Wyetii. ' 

 Society, Brooklyn, N. Y. 



'Anatomical Eeaeons ("or Dextral Preference i 

 Vol. II, 1880, p. 129. 



Man." Annals of Anatomical and Surgical 



