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Among the remarkable coral formations to which the general visitor's attention may be directed, are the sea-mushroom, the remains of a single polypus of great size; the brainstone, which presents a circular mass of long winding cells, and altogether has the appearance of the masses and veins of the brain; the sea-pen, and the sea-fan.
In the first group: organ-pipe coral, gorgonian coral arranged into fan shapes, soft sponges from Syria, isis coral from the Molucca Islands, sea-pen coral, wonderful coral of the genus Virgularia from the waters of Norway, various coral of the genus Umbellularia, alcyonarian coral, then a whole series of those madrepores that my mentor Professor Milne-Edwards has so shrewdly classified into divisions and among which I noted the wonderful genus Flabellina as well as the genus Oculina from Réunion Island, plus a "Neptune's chariot" from the Caribbean Sea every superb variety of coral, and in short, every species of these unusual polyparies that congregate to form entire islands that will one day turn into continents.
After half an hour of walking, the seafloor grew rocky. Jellyfish, microscopic crustaceans, and sea-pen coral lit it faintly with their phosphorescent glimmers. I glimpsed piles of stones covered by a couple million zoophytes and tangles of algae. My feet often slipped on this viscous seaweed carpet, and without my alpenstock I would have fallen more than once.
Every sea-pen is glorious in its light, in fact, nearly every eight-armed Alcyonarian is thus resplendent, and the social Pyrosoma, bulky and a free swimmer, glows like a bar of hot metal with a white and green radiance." Such accounts are enough to indicate how varied and how general a phenomenon is the phosphorescence of the sea.
Recent Extinction. Longevity of Species. Large Animals do not require a luxuriant Vegetation. Southern Africa. Siberian Fossils. Two Species of Ostrich. Habits of Oven-bird. Armadilloes. Venomous Snake, Toad, Lizard. Hybernation of Animals. Habits of Sea-Pen. Indian Wars and Massacres. Arrowhead, antiquarian Relic.
Bahia Blanca Geology Numerous gigantic Quadrupeds Recent Extinction Longevity of species Large Animals do not require a luxuriant vegetation Southern Africa Siberian Fossils Two Species of Ostrich Habits of Oven-bird Armadilloes Venomous Snake, Toad, Lizard Hybernation of Animal Habits of Sea-Pen Indian Wars and Massacres Arrow-head, antiquarian Relic.
Each sea-pen is a colony of Alcyonarians, and the name is due to the singular arrangement of the individuals upon the common stem. This stem is supported internally by a coral rod, but its outer part is composed of fleshy matter belonging to the whole colony.
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