On the marine mollusca of Maderia : with descriptions of thirty-five new species and an index-list of all known sea-dweling species of that island - Watson, Robert Boog. 1823 -1910 (Linnean Society of London, 1897)

Opisthobranch newsletter - Long, Steven J. (S.J. Long, 1969)

Opisthobranch newsletter - Long, Steven J. (S.J. Long, 1970)

Opisthobranch newsletter - Long, Steven J. (S.J. Long, 1977)

Opisthobranch newsletter - Long, Steven J. (S.J. Long, 1980)

Opisthobranch newsletter - Long, Steven J. (S.J. Long, 1981)

Opisthobranch newsletter - Long, Steven J. (S.J. Long, 1982)

Opisthobranch newsletter - Long, Steven J. (S.J. Long, 1983)

Opisthobranchian and lamellarian gastropods collected by the "Vema" - Marcus, Ernst 1893 -1968 (American Museum of Natural History, 1969)

Die Opisthobranchiata der Siboga-expedition - Bergh, Rudolph, 1824 -1909 (Buchhandlung und druckerei vormals E. J. Brill, 1905)

The Opisthobranchiata of South Africa - Bergh, Rudolph, 1824 -1909 (South African Philosophical Society, 1907)

Otia conchologica : descriptions of shells and mollusks, from 1839 to 1862 - Gould, Augustus A. (Augustus Addison), 1805 -1866 (Gould and Lincoln, 1862)

Otia conchologica : descriptions of shells and mollusks from 1839 to 1862 / by Augustus A. Gould, M.D - Gould, Augustus A. (Augustus Addison), 1805 -1866 (1846)

Our country's shells and how to know them : a guide to the British mollusca - Gordon, W. J. (Simpkin, Marshall, Hamilton, Kent & Co, 1901)

An outline of the natural history of our shores - Sinel, Joseph. (S. Sonnenschein, 1906)

Palaeontographia Italica : Memorie di paleontologia - Canavari, Mario 1855 -1928 (Tip. T. Nistri, 1910)

Palaeontographica (Theodor Fischer, 1871)

Palæontology ... - Geological Survey of California. (Caxton press of Sherman and co.], 1864)

Palaeontology - Palaeontological Association (Palaeontological Association, 1986)

Palæontology, invertebrate - Woods, Henry, 1868 -1952 (The University press, 1909)

Papers and proceedings of the Royal Society of Tasmania - Royal Society of Tasmania. (The Society, 1877)

Papers and proceedings of the Royal Society of Tasmania - Royal Society of Tasmania. (The Society, 1890)

Papers in marine biology and oceanography (Pergamon Press, 1955)

Phylogenie und System der Mollusken - Ihering, H. von (Hermann), 1850 -1930 (M. Diesterweg, 1922)

Physis - Sociedad Argentina de Ciencias Naturales. (Asociación Argentina de Ciencias Naturales [etc.], 1918)

The plants of Prince Edward Island - Erskine, D. S. (David Sterling) (Plant Research Institute, Research Branch, Canada Dept. of Agriculture, 1960)

A pocket list of British marine Mollusca - Bailey, George. (Tindall & co., printers, 1887)

Poirieria - Auckland Institute; Museum. Conchology Section. (Auckland Museum, Conchology Section, 1964)

Poirieria - Auckland Institute; Museum. Conchology Section. (Auckland Museum, Conchology Section, 1969)

Poirieria - Auckland Institute; Museum. Conchology Section. (Auckland Museum, Conchology Section, 1970)

Poirieria - Auckland Institute; Museum. Conchology Section. (Auckland Museum, Conchology Section, 1971)

Poirieria - Auckland Institute; Museum. Conchology Section. (Auckland Museum, Conchology Section, 1974)

Poirieria - Auckland Institute; Museum. Conchology Section. (Auckland Museum, Conchology Section, 1983)

Poirieria - Auckland Institute; Museum. Conchology Section. (Auckland Museum, Conchology Section, 1996)

Poirieria - Auckland Institute; Museum. Conchology Section. (Auckland Museum, Conchology Section, 1997)

Popular conchology, or, The shell cabinet arranged according to the modern system : with a detailed account of the animals, and a complete descriptive list of the families and genera of recent and fossil shells - Catlow, Agnes, 1807? -1889 (Longman, Brown, Green, and Longmans, 1854)

A preliminary catalogue of the shell-bearing marine mollusks and brachiopods of the southeastern coast of the United States, with illustrations of many of the species - Dall, William Healey, 1845 -1927 (Govt. Print. Off, 1903)

Proceedings and transactions of the Liverpool Biological Society - Liverpool Biological Society. (The Society, 1891)

Proceedings and transactions of the Liverpool Biological Society - Liverpool Biological Society. (The Society, 1893)

Proceedings and transactions of the Liverpool Biological Society - Liverpool Biological Society. (The Society, 1894)

Proceedings and transactions of the Liverpool Biological Society - Liverpool Biological Society. (The Society, 1895)

Proceedings and transactions of the Liverpool Biological Society - Liverpool Biological Society. (The Society, 1906)

Proceedings and transactions of the Liverpool Biological Society - Liverpool Biological Society. (The Society, 1890)

Proceedings and transactions of the Liverpool Biological Society - Liverpool Biological Society. (The Society, 1913)

Proceedings and transactions of the Royal Society of Canada. Délibérations et mémoires de la Société royale du Canada - Royal Society of Canada. (Société royale du Canada, 1899)

Proceedings and transactions of the Royal Society of Canada. Délibérations et mémoires de la Société royale du Canada - Royal Society of Canada. (Société royale du Canada, 1883)

Proceedings of the Academy of Natural Sciences of Philadelphia - Academy of Natural Sciences of Philadelphia. (Academy of Natural Sciences of Philadelphia, 1904)

Proceedings of the Academy of Natural Sciences of Philadelphia - Academy of Natural Sciences of Philadelphia. (Academy of Natural Sciences of Philadelphia, 1913)

Proceedings of the Academy of Natural Sciences of Philadelphia - Academy of Natural Sciences of Philadelphia. (Academy of Natural Sciences of Philadelphia, 1841)

Proceedings of the Boston Society of Natural History - Boston Society of Natural History. (Boston Society of Natural History, 1848)

Proceedings of the Boston Society of Natural History - Boston Society of Natural History. (Boston Society of Natural History, 1851)

Proceedings of the Boston Society of Natural History - Boston Society of Natural History. (Boston Society of Natural History, 1871)

Proceedings of the Bristol Naturalists' Society - Bristol Naturalists' Society (Bristol, England) (Bristol Naturalists' Society, 1939)

Proceedings of the Bristol Naturalists' Society - Bristol Naturalists' Society (Bristol, England) (Bristol Naturalists' Society, 1954)

Proceedings of the California Academy of Sciences, 4th series - California Academy of Sciences (California Academy of Sciences, 1935)

Proceedings of the California Academy of Sciences, 4th series - California Academy of Sciences (California Academy of Sciences, 1968)

Proceedings of the California Academy of Sciences, 4th series - California Academy of Sciences (California Academy of Sciences, 2004)

Proceedings of the California Academy of Sciences, 4th series - California Academy of Sciences (California Academy of Sciences, 2015)

Proceedings of the Linnean Society of New South Wales - Linnean Society of New South Wales. (Linnean Society of New South Wales, 1877)

Proceedings of the Linnean Society of New South Wales - Linnean Society of New South Wales. (Linnean Society of New South Wales, 1902)

Proceedings of the Linnean Society of New South Wales - Linnean Society of New South Wales. (Linnean Society of New South Wales, 1979)

Proceedings of the Linnean Society of New South Wales - Linnean Society of New South Wales. (Linnean Society of New South Wales, 1989)

Proceedings of the Literary and Philosophical Society of Liverpool - Literary; Philosophical Society of Liverpool. (1854)

Proceedings of the Malacological Society of London - Malacological Society of London (Dulau, 1899)

Proceedings of the Malacological Society of London - Malacological Society of London (Dulau, 1901)

Proceedings of the Malacological Society of London - Malacological Society of London (Dulau, 1903)

Proceedings of the Malacological Society of London - Malacological Society of London (Dulau, 1904)

Proceedings of the Malacological Society of London - Malacological Society of London (Dulau, 1905)

Proceedings of the Malacological Society of London - Malacological Society of London (Dulau, 1907)

Proceedings of the Malacological Society of London - Malacological Society of London (Dulau, 1909)

Proceedings of the Royal Irish Academy - Royal Irish Academy. (Royal Irish Academy, 1888)

Proceedings of the Royal Irish Academy - Royal Irish Academy. (Royal Irish Academy, 1898)

Proceedings of the Royal Physical Society of Edinburgh - Royal Physical Society of Edinburgh. (The Society, 1890)

Proceedings of the Royal Society of Edinburgh - Royal Society of Edinburgh. (Royal Society of Edinburgh, 1892)

Proceedings of the Royal Society of London - Royal Society (Great Britain) (The Society, 1870)

Proceedings of the Royal Society of Victoria - Royal Society of Victoria (Melbourne, Vic.) (The Society, 1903)

Proceedings of the Royal Society of Victoria - Royal Society of Victoria (Melbourne, Vic.) (The Society, 1906)

Proceedings of the Royal Society of Victoria - Royal Society of Victoria (Melbourne, Vic.) (The Society, 1909)

Proceedings of the Royal Zoological Society of New South Wales - Royal Zoological Society of New South Wales. (The Society, 1956)

Proceedings of the Royal Zoological Society of New South Wales - Royal Zoological Society of New South Wales. (The Society, 1958)

Proceedings of the United States National Museum - Smithsonian Institution (Smithsonian Institution Press, [etc.], 1880)

Proceedings of the United States National Museum - Smithsonian Institution (Smithsonian Institution Press, [etc.], 1885)

Proceedings of the United States National Museum - Smithsonian Institution (Smithsonian Institution Press, [etc.], 1920)

Proceedings of the United States National Museum - Smithsonian Institution (Smithsonian Institution Press, [etc.], 1927)

Proceedings of the Zoological Society of London - Zoological Society of London. (Academic Press, [etc.], 1854)

Proceedings of the Zoological Society of London - Zoological Society of London. (Academic Press, [etc.], 1861)

Proceedings of the Zoological Society of London - Zoological Society of London. (Academic Press, [etc.], 1865)

Proceedings of the Zoological Society of London - Zoological Society of London. (Academic Press, [etc.], 1867)

Proceedings of the Zoological Society of London - Zoological Society of London. (Academic Press, [etc.], 1885)

Proceedings of the Zoological Society of London - Zoological Society of London. (Academic Press, [etc.], 1890)

Proceedings of the Zoological Society of London - Zoological Society of London. (Academic Press, [etc.], 1891)

Proceedings of the Zoological Society of London - Zoological Society of London. (Academic Press, [etc.], 1894)