DescriptionImage from page 221 of "Introduction to zoology; a guide to the study of animals, for the use of secondary schools;" (1900) (14598372209).jpg
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Text Appearing Before Image:ber, or even of a worm. The calcareous skeleton is reducedto small plates embedded in the skin. The mouth is sur-rounded by a circle of tentacles.The ambulacral feet are sometimesabsent. The Holothurians live insand and mud, often deeply buried,and feed on small marine animalsor the decaying particles mingledwith the mud which they devour.They are of considerable economicimportance. The members of one genus (Holothuria) istaken in great numbers on the coral reefs of the Pacific i v\o6ovpioi, a sort of water-polyp. FIG. 189. — Caudina, thetailed Holothuriau. a,mouth; b, anus. AfterSelenka. £02 ZOOLOGY
Text Appearing After Image:J FIG.
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