Animal locomotion, or Walking, swimming, and flying, with a dissertation on aëronautics (1874)
Pettigrew, James Bell, 1834-1908 · New York : D. Appleton & company · leaf 98
FIG. 33.—The Porpoise (Phocmna cornmunis). Here the tail is principally en-gaged in swimming, the anterior extremities being rudimentary, ami resem-bling the pectoral fins of lishes. Compare with iig. 30, p. 05. — Original. … FIG. 34.—The Manatee Manatiis American-its}. In this the anterior extremitiesare more developed than in the porpoise, lint still the tail is the great orgiinof natation. Compare with fig. 33, p. 73, and with Iig. 30, p. C5. The shapeof the manatee and porpoise is essentially that of the fish. —…
Animal locomotion · Aeronautics
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