114 3IARINE MAMMALS OF THE NORTH-WESTERN COAST. 



It is difficult to produce a satisftictoiy figure of a seal, for the reason that in 

 its various attitudes the animal materially changes its contour. In one position its 

 neck becomes somewhat slender and elongated, and its head appears comparatively 

 small ; while in another posture the creature seems distorted into a swollen form 

 throughout. Hence we shall introduce a few illustrative figures in addition to the 

 plates which represent the general forms of these animals. 



