Among the Penguins. 217 
very fine specimens of young birds, of all kinds, could 
be obtained in this way, besides giving an interesting 
occupation. 
It seems to me evident that both the seals and the 
penguins obtain their great speed in water less by the 
propelling movement of their legs than by a snake-like 
movement through the water, vertically applied; it 
naturally changes the centre of gravity, and by this 
rapid falling from a higher to a lower level, aided by 
the propelling movement, they attain such speed that 
the quick rise to the same level again is easily accom- 
plished. The seals use their fore flippers mainly to 
keep their balance and for steering purposes, while the 
penguins apply their wings to the same use. By 
constantly observing this movement of the seals and 
A LAGOON AT CAMP RIDLEY. 
penguins I was compelled to compare it with the 
flight of birds. Already on the outward voyage I 
had keenly watched the albatross, which evidently 
