Elements of zoology, or, Natural Elements of zoology, or, Natural history of animals / ed. by Reese elementsofzoolog00rees Year: 1849 fn m 428 ZOOLOGY. tube of leathery consistence, and is often of considerable length. In both groups the animals not being able to go in search of food, obtain it through the currents produced by the action of their cilia. 729. The shell of the common barnacle consists of five pieces, of which two are large valves, somewhat resem- bling those of a mussel; two smaller pieces are jointed to these near the point; and one unites the valves along the back edge.
Elements of zoology, or, Natural Elements of zoology, or, Natural history of animals / ed. by Reese elementsofzoolog00rees Year: 1849 fn m 428 ZOOLOGY. tube of leathery consistence, and is often of considerable length. In both groups the animals not being able to go in search of food, obtain it through the currents produced by the action of their cilia. 729. The shell of the common barnacle consists of five pieces, of which two are large valves, somewhat resem- bling those of a mussel; two smaller pieces are jointed to these near the point; and one unites the valves along the back edge. These cover the whole of the mantle. Barn- acles are abundant in all seas, and fix themselves, in pre- ference, to wood ; so that a piece of timber which has been for a short time floating in the ocean is almost sure to Group of Anatifa, attached to a ship's bottom. be partly covered with them; and ships' bottoms, if not protected with copper, are rendered so foul as greatly to 762. 763. Describe the diagram. What of the sheii of the barnacle ?
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