_Paris Formation_ _First appearance of Fossil Remains of Birds & Mammiferous Animals._ _Diluvial Formation_ _Remains of extinct species of Elephant, Rhinoceros, Hippopotamus, Tapir, Deer, Hyena, Bear &c._ _Post Diluvial Formation_ _Fossil Remains of the Human Species first appear in this formation._ _Edinburgh Published by W^m Blackwood 1827._ _W. H. Lizars Sc._] [Illustration: _PLATE. II. a_ _Page 261._ Extraordinary animal, named PTERODACTYLUS LONGIROSTRIS found near Aichstedt in Germany. _Edinburgh Published by W^m. Blackwood 1827._] [Illustration: _PLATE III._ _Page 318._ FIGURE OF AN IBIS _in one of the Temples in UPPER EGYPT_. _Beak, half the natural size of a mummy Ibis._ _Eng^d. by W. H. Lizars._] [Illustration: _PLATE IV._ _Page 307._ SKELETON OF AN IBIS _extracted from a Mummy found at THEBES in EGYPT_. _Eng^d. by W. H. Lizars Edin^r._] [Illustration: _PLATE V._ _Page 309._ NUMENIUS IBIX _Supposed to be the true Ibix of the EGYPTIANS._ _Eng^d. by W. H. Lizars Edin^r._] [Illustration: _PLATE VI._ _Page 406._ _FOSSIL_ HUMAN SKELETON _FOUND IN GUADALOUPE_ _Edinburgh Published by W^m. Blackwood 1827._] [Illustration: _PLATE VII._ _Page 486._ CERVUS MEGACEROS. _IRISH ELK._ in the MUSEUM of the ROYAL DUBLIN SOCIETY. _W. H. Lizars Sc._ _Edinburgh Published by W. Blackwood 1827._] [Illustration: _PLATE VIII._ _Page 492._ HEAD AND HORNS _of the_ IRISH ELK. _Fig. 1._ _Fig. 2._ _Fig. 3._ _W. H. Lizars Sc._ _Edinburgh Published by W. Blackwood 1827._] [Illustration: _PLATE IX._ _Page 506._ CERVUS MEGACEROS, _ISLE OF MAN OR IRISH ELK_. _Royal Museum, College, Edinburgh._ _W. H. Lizars Sc._ _Published by W. Blackwood. Edin^r. 1827._] ESSAY ON THE THEORY OF THE EARTH. PRELIMINARY OBSERVATIONS.