PLATE X 



Fig. I. Male Sperm whale, Durban, 1926. Note white lips of both jaws, 

 large and small throat grooves. 



Fig. 2. Male Sperm whale. South Georgia, 1925. Circular marks of 

 cephalopod suckers on skin of whale. The cracks in the skin have 

 been made since death. 



Fig. 3. Sperm whale. Cysts of Phyllobothrium physeteris in the blubber. 

 Approximately I natural size. 



