. Birds of other lands, reptiles, fishes, jointed animals and lower forms;. Zoology; Birds; Reptiles; Fishes. Pholo h IV. SaviUcKcnt, A MUSHROOM-CORAL FULLY In thh conJ/ticrj the coral, or ikclcton of the ammai, i: partitions develop upon their surfaces which are merely skeleton-producing sea-anemones, partl_\' secrete within them the symmetrical radiating cal- careous plates so characteristic of the group. Some thirty odd species of sea- anemones are indigenous to British waters, and one or more of these will be familiar to most readers. The Strawberry-anemone, clinging to the rocks as
. Birds of other lands, reptiles, fishes, jointed animals and lower forms;. Zoology; Birds; Reptiles; Fishes. Pholo h IV. SaviUcKcnt, A MUSHROOM-CORAL FULLY In thh conJ/ticrj the coral, or ikclcton of the ammai, i: partitions develop upon their surfaces which are merely skeleton-producing sea-anemones, partl_\' secrete within them the symmetrical radiating cal- careous plates so characteristic of the group. Some thirty odd species of sea- anemones are indigenous to British waters, and one or more of these will be familiar to most readers. The Strawberry-anemone, clinging to the rocks as a hemispherical lump of crimson, green, brown, or red and yellow speckled jelly when the tide is down, and expanding like a beautiful flower when the waters flow back upon it, is the commonest and in many respects the most beautiful of all, the circlet of turquoise beads, regarded as rudimentary cj'cs, developed aroimd the outer margin of the tentacles, add- ing a charm possessed by few other species. The DAiiLLA-ANENn WE, whose expanded disk and innumerable petal- like tentacles may measure as much as 6 or 8 inches in diameter, is the largest British species. These dimen- sions are, however, vastly exceeded by EXPANDED CKfirely toncfdUd the reproductive C H A P T E R VI " CORALS, SEA-ANEMONES, AND JELLY-FISHES WITH the Sea-anemones and Jell\--fishesalmostthc lowest organised group of living animals is reached. As typified by an ordinary sea-anemone, the body may be described as a simple sac, the orifice of which is inverted for some Uttle distance, and held in position with relation to the outer wall by a series of radiating partitions. One or more rows of tentacles, varying in number and character according to the species, surround the mouth of this partially inverted sac. There is no distinct intestinal track, the whole space enclosed within the outer wall and ramifying among the radiating partitions containing the digestive juices. The radiating membranous elements, a
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Keywords: ., bookcentury1900, bookdecad, booksubjectfishes, booksubjectzoology
