. Fig. 12.—Two stages in the growth of the Common Barnacle from the Nauplius stage. Diagrammatic. dr., the double legs or cirri; m, mouth ; 0, the single eye; d, the digestive canal. a\ one of the antennules or " feelers" (that of the right side of the head) provided with a sucking disk by means of which the young animal becomes fixed. increases enormously in size, the delicate transparent shell develops into hard calcareous plates, opening and shutting on the hinge-line of the back. In the stalked kinds a peculiar elongated growth of an inch or several inches in length takes place b
. Fig. 12.—Two stages in the growth of the Common Barnacle from the Nauplius stage. Diagrammatic. dr., the double legs or cirri; m, mouth ; 0, the single eye; d, the digestive canal. a\ one of the antennules or " feelers" (that of the right side of the head) provided with a sucking disk by means of which the young animal becomes fixed. increases enormously in size, the delicate transparent shell develops into hard calcareous plates, opening and shutting on the hinge-line of the back. In the stalked kinds a peculiar elongated growth of an inch or several inches in length takes place between the mouth and the fixed suckers of the antennules (Figs. 10 and 1 2); in the short, so-called, "acorn" kinds, this stalk does not form, but a separate part of the shell grows into a ring-like protective
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectnaturalhistory, booky
