. Beginners zoology. Zoology. 32 BEGINNERS' ZOOLOGY coating has apertures through which the polyps pro- trude in order to feed when no danger is near (Fig. 46).. Fig. 46. — Red Coral- line with crust and polyps (^/^/^/tentacles).. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Coleman, Walter M. Toronto : Macmillan

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Keywords: ., bookcentury1900, bookdecade1920, booksubjectzoology, bookyear1921