Archive image from page 385 of Cuvier's animal kingdom arranged. Cuvier's animal kingdom : arranged according to its organization cuviersanimalkin00cuvi Year: 1840 374 MOLLUSCA. the mouth of the animal. The anterior side, a little under the angle of the side of the mouth, has a notch for the byssus. The anterior adductor muscle is as yet excessively little. When the ears are less prominent, the species have been named Pintadines, Lam. {Margarita, Leach). The most celebrated is the Pearl-mussel {Mytilm mar- garitifcrus, Linn.) Its nacred interior is employed in all sorts of fancy-work, an
Archive image from page 385 of Cuvier's animal kingdom arranged. Cuvier's animal kingdom : arranged according to its organization cuviersanimalkin00cuvi Year: 1840 374 MOLLUSCA. the mouth of the animal. The anterior side, a little under the angle of the side of the mouth, has a notch for the byssus. The anterior adductor muscle is as yet excessively little. When the ears are less prominent, the species have been named Pintadines, Lam. {Margarita, Leach). The most celebrated is the Pearl-mussel {Mytilm mar- garitifcrus, Linn.) Its nacred interior is employed in all sorts of fancy-work, and the orient-pearls, fished for by divers, chiefly at Ceylon, at Cape Comorin, and in the Per- sian Gulf, are but excretions of it. The name of Aviciila is ;fiven to such species as have the ears more pointed, and the shell more oblique. There is in the hinge in front of the ligament, avestigeof a tooth, whose first trace is indeed to be detected in the Pentadines. The Mytilus kirundo, Linn , is an example from the Mediterranean, remarkable for its lengthened auricles : its byssus is large and strong, and has Fig. 187.—Avicuiu macropier». some resemblance to a little shrub. The PinnjE, Linn.— Have two equal wedge-shaped valves, which are closely united by a ligament along one of their sides. The animal {, Poli) is elongated in the same direction as the shell, as well as its lips, its branchiae, and all the other organs. Its cloak is closed on the side of the ligament; its foot is of the shape of a conical little tongue, and marked with a groove; there is a small transverse muscle in the acute angle of the valves, near which the mouth is situated, and a very large muscle at their widest part. On the side of the anus, which is behind this large muscle, there is attached a conical appen- dage, peculiar to this genus, and capable of inflation and elongation, but of the use of which we are ignorant. The byssus of several species is as fine and brilliant as silk, and is
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