. A manual of zoology. Zoology. 260 C(ELENTERATA. Sub Order III. MADREPORARIA. This group, the richest in species of any, is characterized by the great development of the skeleton. Theca, septa, and usually columella and synapticuli are present, and frequently costse as well. Solitary forms are few. Usually they form colonies, fre- quently of thousands of individuals, bound together by a coeuenchym extending from polyp to polyp over the surface of the coral. A colony. Fig. 214. Fig. 215. Fig. 214.—Astrangia danae* ; five polyps in various stages of expansion. Fig. 215.—Cceloria arabica. (After
. A manual of zoology. Zoology. 260 C(ELENTERATA. Sub Order III. MADREPORARIA. This group, the richest in species of any, is characterized by the great development of the skeleton. Theca, septa, and usually columella and synapticuli are present, and frequently costse as well. Solitary forms are few. Usually they form colonies, fre- quently of thousands of individuals, bound together by a coeuenchym extending from polyp to polyp over the surface of the coral. A colony. Fig. 214. Fig. 215. Fig. 214.—Astrangia danae* ; five polyps in various stages of expansion. Fig. 215.—Cceloria arabica. (After Klunzinger.). 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 Hertwig, Richard, 1850-1937; Kingsley, J. S. (John Sterling), 1854-1929. New York, H. Holt and Company
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