On the anatomy of vertebrates - Owen, Richard, 1804 -1892 (Longmans, Green, 1866)

On the anatomy of vertebrates ... - Owen, Richard, 1804 -1892 (Longmans, Green and Co, 1866)

On the archetype and homologies of the vertebrate skeleton - Owen, Richard, 1804 -1892 (John Van Voorst, 1848)

On the construction of a silvered glass telescope, fifteen and a half inches in aperture, and its use in celestial photography - Draper, Henry, 1837 -1882 (Smithsonian institution, 1864)

On the development of the skeleton of the tuatara, Sphenodon punctatis ; with remarks on the egg, on the hatching, and on the hatched young - Howes, George Bond, 1853 -1905 (Printed for the Society, sold at their house in Hanover Square, 1901)

On the development of the skeleton of the Tuatara, Sphenodon punctatus ; with remarks on the egg, on the hatching and on the hatched young - Howes, George Bond, 1853 -1905 (s.n, 1901)

On the development of the vascular system in the foetus of vertebrated animals. Part 2 - Thomson, Allen, 1809 -1884 ([s.n.], 1831)

On the genesis of species - Mivart, St. George Jackson, 1827 -1900 (Macmillan & Co, 1871)

On the genesis of species - Mivart, St. George Jackson, 1827 -1900 (Macmillan, 1871)

On the genesis of species - Mivart, St. George Jackson, 1827 -1900 (D. Appleton, 1871)

On the genesis of species - Mivart, St. George Jackson, 1827 -1900 (D. Appleton and company, 1871)

On the geology and natural history of the upper Missouri :Being the substance of a report made to Lieut. G.K. Warren, T.E. U.S.A - Hayden, F. V. (Ferdinand Vandeveer), 1829 -1887 (Printed by C. Sherman & son, 1862)

On the history and natural arrangement of insects - Shuckard, William Edward, 1802 -1868 (Printed for Longman, Brown, Green & Longman's Paternoster Row, 1840)

On the history and natural arrangement of insects - Shuckard, William Edward, 1802 -1868 (Printed for Longman, Orme, Brown, Green, & Longmans [etc.], 1840)

On the morphology of the duck and the auk tribes - Parker, William Kitchen William Kitchen Parker 1823 -1890 (s.n.], 1890)

On the nature of limbs - Owen, Richard, 1804 -1892 (John Van Voorst, 1849)

On the power, wisdom, and goodness of God : as manifested in the creation of animals, and in their history, habits, and instincts - Jones, Thomas Rymer, 1810 -1880 (H.G. Bohn, 1853)

On the power, wisdom and goodness of God, as manifested in the creation of animals, and in their history, habits and instincts - Kirby, William, 1759 -1850 (Carey, Lea & Blanchard, 1836)

On the power, wisdom and goodness of God as manifested in the creation of animals and in their history, habits and instincts - Kirby, William, 1759 -1850 (W. Pickering, 1835)

On the reptiles and batrachians - Garman, Samuel, 1843 -1927 (Printed for the Museum?, 1883)

On the reptiles and Batrachians of North America - Garman, Samuel, 1843 -1927 (Major, Johnston & Barrett, Yeoman, 1883)

On the skeleton of Toxochelys latiremis - Hay, Oliver Perry, 1846 -1930 (1896)

On the structure and development of the skull in the Batrachia - Royal Society (Great Britain) (Royal Society, 1881)

On the structure and development of the skull in the mammalia - Parker, William Kitchen William Kitchen Parker 1823 -1890 (Royal Society of London, 1874)

On the structure and relations of Notharctus, an American eocene primate - Gregory, William K. (William King), 1876 -1970 (1920)

On Vertebrata of the Mid-Cretaceous of the North West Territory - Geological Survey of Canada (Govt. Print. Bureau, 1902)

On vertebrata of the mid-Cretaceous of the North West Territory - Geological Survey of Canada (Govt. Print. Bureau, 1902)

Opuscula zoologica - Zoologische Staatssammlung München. (Zoologische Staatssammlung, 1958)

The orders of mammals - Gregory, William K. (William King), 1876 -1970 (The Trustees, 1910)

Die ordnungen, familien und gattungen der reptilien als prodrom einer naturgeschichte derselben - Oppel, Michael, 1782 -1820 (In commission bey J. Lindauer, 1811)

Ordosemys (Testudines, Cryptodira) from the Yixian Formation of Liaoning Province, northeastern China : new specimens and systematic revision - Ji, Shu-An. (American Museum of Natural History, 2004)

Organic evolution as the result of the inheritance of acquired characters according to the laws of organic growth - Eimer, Theodor, 1843 -1898 (Macmillan, 1890)