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Many mollusks live upon seaweeds, and the greater number of terrestrial forms are fond of garden vegetables. The food needs to be masticated and the mouth is usually provided with horny jaws, and an additional matricatory apparaus which consists of a kind of tongue with eight to forty thousand minute teeth in our land forms, while in certain marine snails they are beyond computation. With the licking motion of the tongue this rasp tears the food into shreds before it is swallowed. Shown here is a small portion of the radula or tongue-rasp of a snail.


snail, mollusks


Winchell, Alexander Sketches of Creation (New York, NY: Harper & Brothers, 1870)


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