Animal locomotion, or Walking, swimming, and flying, with a dissertation on aëronautics (1874)
Pettigrew, James Bell, 1834-1908 · New York : D. Appleton & company · leaf 166
below upwards, the posterioror thin margin describing a similar but opposite course fromabove downwards. These conditions, I need scarcely observe,are reversed during flexion. The movements of the marginsduring flexion and extension may be represented with a con-siderable degree of accuracy by a… … Fio. 67. FIG. 68.
Animal locomotion · Aeronautics
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