Sea shells. Assortment of shells from various molluscs including bivalves,whelks and winkles. Hard external shells in molluscs are produced by secretions from the folds in the body wall. Molluscs are a group of invertebrates which includes gastropods (slugs and snails),bivalves (clams and cockles) and cephalopods (cuttlefish,octopuses). Because of their permanence and beauty,shells of many marine molluscs are widely collected and given common names. Commonly found shells include the spiral staircase,periwinkle,conch,finger shell and oyster drill | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Hart-Davis, Adam |
Bildgröße: | 4845 px × 3939 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |