. Corals and coral islands. Coral reefs and islands; Corals. CORAL-MAKING AUTINOIB POLYPS. 57 mouth has its own circle; and in the third, the separation has gone so far as to complete the circles and make two independ- ent polyps. This dividing one's self in two, for the sake of an increase of population, is the process called spontaneous fis- sion or fissiparity. This mode of budding does not belong exclusively to coral polyps, for it has been observed among a few ActinioB. Gosse describes its occurrence in a British species, the Anthea cereus^ in which it results in two distinct animals. He
. Corals and coral islands. Coral reefs and islands; Corals. CORAL-MAKING AUTINOIB POLYPS. 57 mouth has its own circle; and in the third, the separation has gone so far as to complete the circles and make two independ- ent polyps. This dividing one's self in two, for the sake of an increase of population, is the process called spontaneous fis- sion or fissiparity. This mode of budding does not belong exclusively to coral polyps, for it has been observed among a few ActinioB. Gosse describes its occurrence in a British species, the Anthea cereus^ in which it results in two distinct animals. He says "the fission begins at the margin of the disk, and gradually extends downward until the separation is complete, when each moiety soon closes and forms a perfect ; The same author al- ludes to the occurrence of double-disked individuals of the gen- era Actinoloba, and Actinia as illustrating the process without a separation of the spontaneously developed pair. This spontaneous fission is the common kind of budding in the large Astraea ASTKiBA PALLIDA, D. The preceding figure represents a species of living coral of the Astraea family, from the Feejees, the Astrcea pallida D,. 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 Dana, James Dwight, 1813-1895. New York, Dodd & Mead
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Keywords: ., bookcentury1800, bookdecade1870, bookpublishernewyo, bookyear1874
