A Monograph on the Sub-Class Cirripedia: With Figures of All the Species (1854)

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Excerpt: ...and the thorax seems of no service, excepting perhaps as a sort of outer lip to protect the mouth. The cirri are in an extreme state of abortion, and evidently functionless; they are lined with purplish corium, without the vestige of a muscle; they are usually distorted and bent in different directions; they vary in size, and even those on opposite sides of the same individual, sometimes do not correspond, and do not arise from exactly corresponding points of the thorax. There are always two pair of cirri, which ...

A Monograph on the Sub-Class Cirripedia: With Figures of All the Species (1854) 2010, Kessinger Publishing

ISBN-13: 9781166492632

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