Cross-section of Chambered Nautilus --- Image by © Klaus Hackenberg/Corbis
Cross section of Chambered Nautilus --- Image by © Josh Westrich/Corbis
Nautilus shell against grid background --- Image by © Tetra Images/Corbis
11 Aug 2005 --- Nautilus Shell --- Image by © Frans Lanting/Corbis
Germany --- Ammonite Fossil in Slate --- Image by © Walter Geiersperger/Corbis
Original caption: A fossil ammonite on the Jurassic Coast World Heritage Site in the Lyme Regis area of Dorset, England, UK. --- Image by © Frank Siteman/Science Faction/Corbis
Original caption: Ammonite fossil. Ammonites are extinct marine invertebrates. They first appeared in the Late Silurian to Early Devonian period (around 400 million years ago) and became extinct at the end of the Cretaceous period (65 million years ago). --- Image by © Gavin Kingcome/Science Photo Library/Corbis
04 May 2009 --- X-ray Image, Shell --- Image by © Imagemore Co., Ltd./Corbis
Moon snail shell, extreme close-up --- Image by © 2/Frank Krahmer/Ocean/Corbis
ca. 2003 --- Half Nautilus --- Image by © John Kuss/Corbis
Chambered nautilus (nautilus sp) cross section --- Image by © 2/joSon/Ocean/Corbis
Madagascar --- A close view of nautilus fossils in Madagascar --- Image by © AStock/Corbis
Chambered Nautilus (Nautilus pompilius) shell, New Zealand
Schnecke No. nautilus_cut_11496.tif
Nautilus shell. Close-up of a sectioned shell of a nautilus (Nautilus pompilius), showing the spiral structure and chambers of mother-of-pearl (nacreous). The nautilus is a marine cephalopod related to the squid, which inhabits the Indo- Pacific region.
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05 Dec 2011 --- Chambered Nautilus (Nautilus pompilius) cross section of shell showing chambers --- Image by © Robert Pickett/Visuals Unlimited/Corbis
26 Jan 2012 --- Sea shell, X-ray. This sea shell is from a marine gastropod mollusc (sea snail), with the mollusc living in the space inside the shell. The shell mainly comprises calcium carbonate, which is embedded on an organic scaffold. This shell is formed from secretions produced by the mollusc, and grows in size over time, following a spiral pattern. The X-ray shows internal details of this pattern. --- Image by © Gustoimages Ltd/Science Photo Library/Corbis
26 Jan 2012 --- Snail shell, X-ray. This shell is from a gastropod mollusc (snail), with the mollusc living in the space inside the shell. The shell mainly comprises calcium carbonate, which is embedded on an organic scaffold. This shell is formed from secretions produced by the mollusc, and grows in size over time, following a spiral pattern. The X-ray shows internal details of this pattern. --- Image by © Gustoimages Ltd/Science Photo Library/Corbis
14 Dec 2012, Northumberland, England, UK --- Limpet shell on sandstone rock, Northumberland, Northeast England, United Kingdom, Europe --- Image by © Peter Barritt/robertharding/Corbis
29 Mar 2012, Indonesia --- Tail-Light Squid Shell (Spirula spirula), Raja Ampat, Indonesia. Diagonal of frame approximately 10 mm. LM --- Image by © Solvin Zankl,/Visuals Unlimited/Corbis
Nautilus shell --- Image by © Josh Westrich/Corbis
Graphic Design; Snail Shell --- Image by © 68/Ocean/Corbis
A spiral shaped nautilus shell --- Image by © Tetra Images/Corbis
Original caption: The Nautilus is nature's most beautiful example of the mathematical principle of the "golden ratio" and the number Phi. --- Image by © Doug Landreth/Science Faction/Corbis
Negative Image of Chambered Nautilus Shell --- Image by © James L. Amos - The Stock Connec/Science Faction/Corbis
Nautilus shell, South Pacific Ocean --- Image by © Frans Lanting/Corbis
03 Oct 2008 --- Found on Cumberland Island, Georgia, a single spiralling Naticid Snail shell with blue and pink hues. --- Image by © Visuals Unlimited/Corbis
14 Nov 2009 --- Nautilus cymatoceras; habitat: Mitsinjo, Sitampiky, Madagascar; age: Early Cretaceous, Albian, ca 100 millions years; size 15 cm. --- Image by © Walter Geiersperger/Corbis
Pearlised nautilus sea shell --- Image by © 13/Finn Fox/Ocean/Corbis
Split nautilus seashell --- Image by © 145/Lucidio Studio Inc/Ocean/Corbis
Hughenden, Australia --- A steel plate public art sculpture depicts the spirals of an ammonite --- Image by © 167/Jason Edwards/Ocean/Corbis
Chambered Nautilus (Nautilus pompilius) shell, New Zealand
Close-up of sundial shell --- Image by © Lorena Arnold/Glowimages/Corbis
Schnecke No. nautilus_cut_11517.tif
Nautilus shell. Close-up artwork of a sectioned shell of a nautilus (Nautilus pompilius), showing the spiral structure and chambers of mother-of-pearl (nacreous). The nautilus is a marine cephalopod related to the squid, which inhabits the Indo- Pacific region.
Schnecke No. nautilus_cu11518.tif
Nautilus shell. Close-up artwork of a sectioned shell of a nautilus (Nautilus pompilius), showing the spiral structure and chambers of mother-of-pearl (nacreous). The nautilus is a marine cephalopod related to the squid, which inhabits the Indo- Pacific region.
Canada --- Split nautilus shell on a bamboo board --- Image by © 145/Lucidio Studio Inc/Ocean/Corbis
26 Jan 2012 --- Sea shell, X-ray. This sea shell is from a marine gastropod mollusc (sea snail), with the mollusc living in the space inside the shell. The shell mainly comprises calcium carbonate, which is embedded on an organic scaffold. This shell is formed from secretions produced by the mollusc, and grows in size over time, following a spiral pattern. The X-ray shows internal details of this pattern. --- Image by © Gustoimages Ltd/Science Photo Library/Corbis
Nautilus sea shell in the sand --- Image by © Vladimir Shulevsky/age fotostock Spain S.L./Corbis
Chambered Nautilus (Nautilus pompilius) cross section of shell showing chambers --- Image by © Robert Pickett/Papilio/Corbis
10 Oct 1997 --- Ammonite. Fossilised spiral shell of an ammonite, an extinct squid-like cephalopod animal (sub- class: Ammonoidea) related to the living nautilus. The outer ridges of the shell are seen. Internally the shell was divided into chambers; by pumping water into and out of the chambers the animal could move down and up in the water. This sea creature lived in the outer chamber of the shell. Many species of ammonite flourished from the Devonian period (400 million years ago) until becoming extinct at about the same time as the dinosaurs at the end of the Cretaceous period (about 65 million years ago). This specimen was found in the Sahara desert, once a sea. --- Image by © MARTIN BOND/Science Photo Library/Corbis