Mollusques vivants et fossiles : ou, description de toutes les espèces de coquilles et de mollusques ; classées suivant leur distribution géologique et géographique - Orbigny, Alcide Dessalines d', 1802 -1857 (Gide et Cie., éditeurs, 1845)

Moluscos - Gay, Claudio, 1800 -1873 (1854)

Le monde de la mer - Frédol, Alfred. (L. Hachette & Cie, 1866)

Monitore zoologico italiano - Unione zoologica italiana. (Instituto anatomico della R. Università di Siena, 1919)

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 Palaeontographical Society - Palaeontographical Society (Great Britain) (Printed for the Palaeontographical Society, 1849)

Monograph of the Palaeontographical Society - Palaeontographical Society (Great Britain) (Printed for the Palaeontographical Society, 1868)

Monograph of the Palaeontographical Society - Palaeontographical Society (Great Britain) (Printed for the Palaeontographical Society, 1880)

A monograph of the recent Cephalopoda based on the collections in the British Museum (Natural History) - Robson, G. C. (Guy Coburn), 1888 -1945 (1929)

A monograph of the recent Cephalopoda based on the collections in the British Museum (Natural History) - Robson, G. C. (Guy Coburn), 1888 -1945 (1932)

Monograph on the fossil reptilia of the London clay - Owen, Richard, 1804 -1892 (Palaeontographical Society, 1849)

Monograph on the Lias Ammonites of the British islands - Wright, Thomas, 1809 -1884 (Printed for the Palæontographical society, 1880)

Monograph on the Lias Ammonites of the British islands - Wright, Thomas, 1809 -1884 (Printed for the Palæontographical society, 1884)

Monthly microscopical journal: transactions of the Royal Microscopical Society, and record of histological research at home and abroad - Royal Microscopical Society (Great Britain) (R. Hardwicke, 1872)

Morphogenetische Studien : als Betrag zur Methodologie zoologischer Forschung - Garbowski, Tadeusz, 1869 -1940 (G. Fischer, 1903)

Morphologisches Jahrbuch (Wilhelm Engelmann, 1876)