PLATE XX 



Fig. I . A newly bom Elephant seal pup and its mother. A portion of 

 the attached umbilical cord can be seen below the abdomen of the pup. 



Fig. 2. A cow suckling her pup. She is lying on her side while the pup 

 suckles at the lower nipple ; the upper one can be seen as a dark spot 

 above the pup's nose. 



