. Elements of zoölogy : a textbook. Zoology. FORM AND 8TRUCTURE. 467 Polyps arc marine radiates which have a sack-like or tubular body, with a circular top or disk, in the center of FlG 704 which is an opening called the mouth; and surrounding the mouth are one or more rows of hollow feelers or tentacles. The mouth opens directly into an inner sack, which is the stomach, and this stomach opens at the bottom into the main cavity of the body. The main cavity Qf ^ bo(jy .g diyid_ ed by radiating septa or partitions, which run from the FIG. 705.*. Cluster of Coral-Polyps, Asteroides calycularis, M
. Elements of zoölogy : a textbook. Zoology. FORM AND 8TRUCTURE. 467 Polyps arc marine radiates which have a sack-like or tubular body, with a circular top or disk, in the center of FlG 704 which is an opening called the mouth; and surrounding the mouth are one or more rows of hollow feelers or tentacles. The mouth opens directly into an inner sack, which is the stomach, and this stomach opens at the bottom into the main cavity of the body. The main cavity Qf ^ bo(jy .g diyid_ ed by radiating septa or partitions, which run from the FIG. 705.*. Cluster of Coral-Polyps, Asteroides calycularis, M. Edwards—in various stages of 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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