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BOOKS The molluscs with their calcareous shell are among the animals that were better preserved in time and that can be more easily studied. Were published tens of thousands of books on this subject. Some of these are of great interest to academics and empassioned. As the copyright cease to older books than seventy years, many have been converted into pdf files and are freely downloadable and usable. The newer ones should be purchased instead. The most important book is that from Linnaeo, an academic who in 1758 established the rules of the nomenclature of the species of nature and described many plants and many animals. Many of the names he assigned to things are still in use. From here you can download his "Systema Naturae" of 1758. Then we will give you directions to other texts where to look for images of the photos of molluscs to compare them with those in your possession. Systema Naturae (55 Mb) entire book - pdf file free downloadable The Molluscs are described as VERMES-TESTACEA and you can loook at starting from page 667 Systema Naturae (8,5 Mb) a short version to reduce the size of the download Only the first 17 pages and the Testacea-Vermes pages 671 to 792 A very useful book received from our friend and "honorisa causae member" of the team Rolanda Maria Albuquerque De Matos.