The royal natural history . A BRANCHING CORAL, , Terminal of a stock (uat. size); B, Longitudinal section of a single polyp (magnified). can withdraw at the approach of danger, drawing all its tentacles (which alsocontract) down to a. The space occupied by the animal is not very roomy atthe best, and it is further limited both by a great columella (/, rising up in its interior, and by the solid septa b projecting into itall round. It must not be forgotten that these partsare not in the animal but outside of it, and as theyare secreted they push the skin up and never pene
The royal natural history . A BRANCHING CORAL, , Terminal of a stock (uat. size); B, Longitudinal section of a single polyp (magnified). can withdraw at the approach of danger, drawing all its tentacles (which alsocontract) down to a. The space occupied by the animal is not very roomy atthe best, and it is further limited both by a great columella (/, rising up in its interior, and by the solid septa b projecting into itall round. It must not be forgotten that these partsare not in the animal but outside of it, and as theyare secreted they push the skin up and never pene-trate into the tissues themselves. These polyps budat intervals, the apical polyp most frequently : andthe result is a simple branched stock, as seen. A different kind of stock is developed when thepolyps produce many buds, as in the these delicate stocks, selected polyps spring upabove the rest, and their sides become covered with s. .,-j. small buds. Space^,%jl (,,,V^3^^ would obviously Jfm ? not permit all
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Keywords: ., bookcentury1800, booksubjectnaturalhistory, booksubjectzoology
