Some patterns in nature are formed by natural growth mechanisms, as with the spiral shape of the nautilus shell. |
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Despite inherent inefficiencies, jetting is the primary mode of locomotion for both primitive nautilus and powerful, migratory oceanic squids. |
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The aborigines believe that the skeleton of each dead moon drops into the sea and becomes the shell of the chambered nautilus. |
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Another theory is that because ammonoids grew faster and had thinner shells, the shells were not as strong as those of the nautilus. |
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The eggs and hatchlings of the chambered nautilus are the largest of all cephalopods. |
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The nautilus shell and miter shell are arranged as illustrations from a natural science sketch book. |
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The shell contains a gas which makes it semi-buoyant, permitting the nautilus to change depth and to swim. |
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Most resorts in Manado can make special arrangements with local fishermen to show you the prehistoric nautilus. |
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Unlike most other cephalopods that have a short life span, the chambered nautilus can live 16 or more years. |
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The pearly nautilus is an exception to most generalizations about cephalopods. |
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You can find them in phenomena ranging from the shell of the chambered nautilus to hurricanes and spiral galaxies. |
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One of the most astounding cephalopods is the paper nautilus also known as argonaut. |
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Geology students recommend you check out the nautilus shells in limestone mounted on the bar. |
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Meanwhile, only a few species of pearly nautilus continue as the last survivors of the once important Nautiloidea. |
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The Nautilids include the modern pearly nautilus and its evolutionary ancestors and relatives. |
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A nautilus does not have suckers on its tentacles like an octopus does. |
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Between 1832 and 1843 Villepreux-Power closely studied the paper nautilus A. argo. |
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This obviously attracted a better class of nautilus, and a bumper crop was viewed by the team the next day in a wonderful dive hanging over an abyssal drop-off. |
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All were available in plain or patinated brass or copper, and they included a variety of shells, such as Philippine, chiton, limpet, melon, triton, sea conch, and nautilus. |
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Today's nautilus is a direct descendant of the Nautiloid, while octopi and squid are indirect descendants. |
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Except for the nautilus, all living members of the class show great modification and reduction of the characteristic molluscan shell. |
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The oscillating weight specially designed for this model is engraved with a nautilus motif. |
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Produced throughout Europe, nautilus cups were an extremely desirable blend of superb craftsmanship in combination with one of nature's most admired creations. |
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Ammonoids are descendants of the extinct, primitive coiled nautiloids and they are extinct relatives of modern squid, octopus, cuttlefish, and nautilus. |
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The paper nautilus is related to the octopus. |
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In the 60s, there was no way of making Utzon's paper nautilus volutes. |
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She's got an elegant collection of cowry, nautilus and snail shells dipped in gold as well. |
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Bernoulli was partial to the logarithmic or equiangular spiral, which spreads out as it travels outward, like a nautilus shell. |
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The giant snail-like nautilus is a living fossil that has been in our waters for about 500 million years. |
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But in the repeated curve of her thigh and calf he saw shapes like sea shells, with the luminescence and faint muscular rays of the great chambered nautilus. |
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This creature is a female Argonaut, or paper nautilus, a species of cephalopod which was was recently scooped out of the ocean off the California coast. |
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He was still prepared to go on collecting all that life could offer, like a chambered nautilus patiently adding new cells to its slowly expanding spiral. |
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Neither true nautilus, nor paper, and not even technically a shell, the paper nautilus shell is actually the egg case of a tropical-to-subtropical octopus called Argonauta. |
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