Читать книгу The Sea and Its Living Wonders - G. Hartwig - Страница 20
CHAPTER XVII. CŒLENTERATA. POLYPS AND JELLY-FISHES.
Оглавление| Thread-cells or Urticating Organs.—Sertulariæ.—Campanulariadæ.—Hydrozoic Acalephæ.—Medusidæ.—Lucernariadæ.—Calycophoridæ.—The Velella.—The Portuguese Man-of-war.—Anecdote of a Prussian Sailor.—Alternating Fixed and Free-swimming Generations of Hydrozoa.—Actinozoa.—Ctenophora.—Their Beautiful Construction.—Sea-anemones.—Dead Man's Toes.—Sea-pens.—Sea-rods.—Red Coral.—Coral Fishery.—Isis hippuris.—Tropical Lithophytes.—History of the Coral Islands.—Darwin's Theory of their Formation.—The progress of their Growth above the level of the Sea | 345 |
