The mollusks of western North America embracing the second report made to the British Association on this subject, with other papers, reprinted by permission, with a general index - British Association for the Advancement of Science. (Smithsonian Institution, 1872)

Mollusques - Pelseneer, Paul, 1863 -1945 (Rueff, 1897)

Mollusques de l'isla del Coco - Museo Nacional de Costa Rica (Tipografia nacional, 1907)

Mollusques éocéniques de la Loire-inférieure - Cossmann, M. (Maurice), 1850 -1924 (Pequignot, 1895)

Los moluscos de la República de Panamá - Zetek, James, 1886 - (Imp. nacional, 1918)

Monatsberichte der Königlichen Preussische Akademie des Wissenschaften zu Berlin - Königlich Preussische Akademie der Wissenschaften zu Berlin (Königliche Akademie der Wissenschaften, 1864)

Monatsberichte der Königlichen Preussische Akademie des Wissenschaften zu Berlin - Königlich Preussische Akademie der Wissenschaften zu Berlin (Königliche Akademie der Wissenschaften, 1865)

A monograph of Christmas Island (Indian Ocean) - British Museum (Natural History). Department of Geology. (Printed by order of the Trustees, 1900)

A monograph of the Crag mollusca; or, Descriptions of shells from the middle and upper Tertiaries of the east of England - Wood, Searles V. (Searles Valentine), 1798 -1880 (Palaeontographical Society, 1848)

A monograph of the Crag Mollusca : with descriptions of shells from the upper Tertiaries of the British Isles - Wood, Searles V. (Searles Valentine), 1798 -1880 (Printed for the Palæontographical society, 1848)

A monograph of the Crag Mollusca; with descriptions of shells from the upper Tertiaries of the British Isles - Wood, Searles V. (Searles Valentine), 1798 -1880 (Printed for the Palaeontographical Society, 1848)

A monograph of the Crag Mollusca; with descriptions of shells from the upper Tertiaries of the British Isles - Wood, Searles V. (Searles Valentine), 1798 -1880 (Printed for the Palaeontographical Society, 1872)

A monograph of the Eocene Mollusca : descriptions of shells from the older Tertiaries of England - Palaeontographical Society (Great Britain) (Printed for the Palaeontographical Society, 1849)

[Monograph of the genera and species of Pneumonopoma : a manuscript English translation by the author of his "Monographia Pneumonopomorum viventium, ...." - Gray, John Edward 1800 -1875 (1875)

Monograph of the Palaeontographical Society - Palaeontographical Society (Great Britain) (Printed for the Palaeontographical Society, 1848)

Monograph of the Palaeontographical Society - Palaeontographical Society (Great Britain) (Printed for the Palaeontographical Society, 1852)

Monograph of the Palaeontographical Society - Palaeontographical Society (Great Britain) (Printed for the Palaeontographical Society, 1877)

Monograph of the Palaeontographical Society - Palaeontographical Society (Great Britain) (Printed for the Palaeontographical Society, 1913)

A monograph of the terrestrial Mollusca inhabiting the United States : with illustrations of all species - Tryon, George W., (George Washington), 1838 -1888 (The Author, 1866)

A monograph of the terrestrial Mollusca inhabiting the United States. With illustrations of all the species - Tryon, George W., (George Washington), 1838 -1888 (Published by the author, 1866)

Monographia auriculaceorum viventium. Sistens descriptiones systematicas et criticas omnium hujus familiae generum et specierum hodie cognitarum, nec non fossilium enumeratione - Pfeiffer, Louis (Ludwig Georg Karl), 1805 -1877 (Sumptibus Theodore Fischer, 1856)

Monographia heliceorum viventium : sistens descriptiones systematicas et criticas omnium huius familiae generum et specierum hodie cognitarum - Pfeiffer, Louis (Ludwig Georg Karl), 1805 -1877 (Brockhaus, 1853)

Monographia heliceorum viventium : sistens descriptiones systematicas et criticas omnium hujus familiae generum et specierum hodie cognitarum / auctore Ludovico Pfeiffer - Pfeiffer, Louis (Ludwig Georg Karl), 1805 -1877 (1853)

Monographia molluscorum terrestrium fluvialium, lacustrium, insularium Maderensium - Castello de Paiva, Antonio da Costa Paiva, barão de, 1806 -1879 (Olisipone, 1867)

Monographia pneumonopomorum viventium .... Supplementum tertium monographiae auriculaceorum, parte secunda auctum - Pfeiffer, Louis (Ludwig Georg Karl), 1805 -1877 (sumptibus T. Fischer, 1876)

A monographic revision and synopsis of the Trichoptera of the European fauna : First additional supplement - McLachlan, Robert, 1837 -1904 (J. Van Voorst, 1884)

Monographie des élatérides - Candèze, E. C. (Ernest Charles), 1827 -1898 (H. Dessain, 1860)

Monographs of the Diptera of North America - Osten-Sacken, C. R. (Carl Robert), 1828 -1906 (Smithsonian Institution, 1862)

Monthly Magazine or British Register (of Politics, Literature and the Belles Lettres) (1808)

Monthly Magazine or British Register (of Politics, Literature and the Belles Lettres) (1816)

Monthly Magazine or British Register (of Politics, Literature and the Belles Lettres) (1798)

Monthly Magazine or British Register (of Politics, Literature and the Belles Lettres) (1828)

Monthly Magazine or British Register (of Politics, Literature and the Belles Lettres) (1806)

Monthly Magazine or British Register (of Politics, Literature and the Belles Lettres) (1809)

The Museum (W.F. Webb, 1898)

Nachrichtsblatt der Deutschen Malakozoologischen Gesellschaft - Deutsche Malakozoologische Gesellschaft (Verlag W. Küchler, 1872)

Nachrichtsblatt der Deutschen Malakozoologischen Gesellschaft - Deutsche Malakozoologische Gesellschaft (Verlag W. Küchler, 1874)

Nachrichtsblatt der Deutschen Malakozoologischen Gesellschaft - Deutsche Malakozoologische Gesellschaft (Verlag W. Küchler, 1875)

Nachrichtsblatt der Deutschen Malakozoologischen Gesellschaft - Deutsche Malakozoologische Gesellschaft (Verlag W. Küchler, 1876)

Nachrichtsblatt der Deutschen Malakozoologischen Gesellschaft - Deutsche Malakozoologische Gesellschaft (Verlag W. Küchler, 1879)