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The drum-fish was not heard except when we were at anchor; its sound somewhat suggests a distant frog- concert, and I soon learned to enjoy what M. Dufosse has learnedly named "ichthyopsophosis," the song of the fish.
Dufosse, who has especially attended to this subject, says that the sounds are voluntarily produced in several ways by different fishes: by the friction of the pharyngeal bones by the vibration of certain muscles attached to the swim bladder, which serves as a resounding board and by the vibration of the intrinsic muscles of the swim bladder.
Duck, pintail, pairing with a widgeon. Duck, voice of the; pairing with a shield-drake; immature plumage of the. Duck, wild, sexual differences in the; speculum and male characters of; pairing with a pin-tail drake. Ducks, wild, becoming polygamous under partial domestication; dogs and cats recognised by. Dufosse, Dr., sounds produced by fish. Dugong, nakedness of; tusks of.
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