. Elements of zoölogy : a textbook. Zoology. BRYOZOA. FIQ. 667. 437. Bryoza, CeUularia avicularia. a, natural size of a growing cluster; b and c, portions much magnified; d, bryo- zoan in its cell. species every cell has its " birds' head" (Fig. 667), and this structure is exceedingly active, opening, shutting, and snapping almost continually. Many of the marine kinds produce coral; and patches of this substance are common on stones, shells, and sea-weeds. These delicate patches of coral are composed. Please note that these images are extracted from scanned page images that may have


. Elements of zoölogy : a textbook. Zoology. BRYOZOA. FIQ. 667. 437. Bryoza, CeUularia avicularia. a, natural size of a growing cluster; b and c, portions much magnified; d, bryo- zoan in its cell. species every cell has its " birds' head" (Fig. 667), and this structure is exceedingly active, opening, shutting, and snapping almost continually. Many of the marine kinds produce coral; and patches of this substance are common on stones, shells, and sea-weeds. These delicate patches of coral are composed. 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 Tenney, Sanborn, 1827-1877. New York : Scribner


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