Swimming of the seal, sea-bear, and walrus, [74]
Swimming of man, [78]
Swimming of the turtle, triton, crocodile, etc., [89]
Terrestrial animals have smaller travelling surfaces than amphibia, amphibia than fishes, and fishes than insects, bats, and birds, [8]
The travelling surfaces of animals increase as the density of the media traversed decreases, [7], [8]
The travelling surfaces of animals variously modified and adapted to the media on or in which they move, [34]
Walking, swimming, and flying correlated, [5]
Walking of the quadruped, biped, etc., [9], [10], [11]
Wave wing of Pettigrew, [236]
Do. how to construct on insect type, [240]