Elements of zoölogy a Elements of zoölogy : a textbook elementsofzolo00tenn Year: c1875 FIG. 548. Teeth of Murex tenuispina, Welton. One of the most curious parts of these animals is the tongue, or lingual ribbon, which is a band armed with a great number of glossy siliceous teeth, which are arranged in rows in the most regular man- ner; and differently in the differ- ent kinds of gasteropods. The tongue of some kinds contains one hundred and sixty rows of teeth, and one hundred and eighty teeth in each row, or more than twenty-eight thousand in all! Many of the Gasteropods feed upon vegetab
Elements of zoölogy a Elements of zoölogy : a textbook elementsofzolo00tenn Year: c1875 FIG. 548. Teeth of Murex tenuispina, Welton. One of the most curious parts of these animals is the tongue, or lingual ribbon, which is a band armed with a great number of glossy siliceous teeth, which are arranged in rows in the most regular man- ner; and differently in the differ- ent kinds of gasteropods. The tongue of some kinds contains one hundred and sixty rows of teeth, and one hundred and eighty teeth in each row, or more than twenty-eight thousand in all! Many of the Gasteropods feed upon vegetable substances, and these generally have the aperture of the shell entire. The others portion of Tongue of the feed upon animal substances, and ***«««» ^datum. Magnified.
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