Animal locomotion or walking, swimming, and flying : with a dissertation on aëronautics (1873)
Pettigrew, James Bell, 1834-1908 · London : Henry S. King & Co. · leaf 120
me time, proceeding from without in-wards and from below upwards during flexion, or when it is\\ rtded up, as happens during the back stroke. In the acts ofextension and flexion the legs are slightly rotated, and the PEOGEESSIOX OX AXD IX THE WATER. 97 feet more or less tilted. The same movements… … Fig. 49.—Foot of Grebe (Podiceps). In this foot each, toe is provided with itsswimming membrane ; the membrane being closed when the foot is flexed,and expanded when the foot is extended. Compare with foot of swau (fig.4S), where the swimming membrane is continued from the one toe to…
Animal locomotion · Physiology · Aeronautics
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