Animal locomotion, or Walking, swimming, and flying, with a dissertation on aëronautics (1874)
Pettigrew, James Bell, 1834-1908 · New York : D. Appleton & company · leaf 99
and allowsthe tail to be lashed freely about in a vertical direction. Compare withJig. 29, p. 65.—(After Dallas.) act upon the water laterally as in the fish. The tail of thebird, which is also compressed from above downwards, canbe twisted obliquely, and when in this position may be madeto… … Fio. 36 —The Seal (Phocafaetida, Mull.), adapted principally for water. Theextremities are larger than in the porpoise and manatee. Compare withfigs. 33 and 34, p. 73.— Original. form, however, and mode of progression (if the fact of itsoccasionally swimming on its back be taken into account),…
Animal locomotion · Aeronautics
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