Nautilus shells and ammonite,engraving
Numéro d’image : 11911717
| Nautilus shells and ammonite. 1752 engraving of the shell of a nautilus (Nautilus sp. Fig. 1 & 2) and that of an ammonite (Fig. 3),an extinct relative. When cut open,the shell of a nautilus is seen to consist of a spiral of air-filled chambers. The animal lives in the outermost chamber,building successively larger additions through its life. A tube called a siphuncle links the chambers and keeps them filled with gas,which gives the animal buoyancy in its marine habitat. There are only six living species of Nautilus,descended from a large group that originated in the early Palaeozoic Era | |
| Licence : | Droits gérés |
| Crédit: | Science Photo Library / Bernard, George |
| Taille de l’image : | 3069 px × 4605 px |
| Model Release : | Non requis |
| Property Release : | Non requis |
| Restrictions : | - |
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