18. ------------------------------ the Pelorosaurus 197 19. Silicification and Siliceous Petrifactions _ib._ 20. Stigmariæ and Sigillariæ 198 WORKS REFERRED TO IN THE DESCRIPTIONS. Michelin, Iconographie Zoophytologie, Paris, 4to. Göppert, H. R. Die Fossilen, Farrnkrauter,--forming vol. xvii. of the Nova Acta Academiæ C. L. C. Naturæ Curiosorum. 1836, 4to. Presl, C. B., Sternberg, Dr. G. Flora der Vorwelt, Part VII. and VIII. edited by Presl. Goldfuss, Dr. A., Petrefacta Germaniæ, folio, Dusseldorf, 1841-44. Fossil Flora of Great Britain, by Dr. Lindley and Mr. Button. Dr. Buckland's Bridgewater Essay on Geology and Mineralogy, 2 vols, with numerous Plates. The Wonders of Geology, 3 vols, sixth edition, 1849. The Medals of Creation, 2 vols. 1844. Geological Excursions round the Isle of Wight and along the adjacent Coast of Dorsetshire, 1 vol. numerous Plates. Thoughts on Animalcules, 1 vol. numerous coloured Plates, second edition, 1850. Thoughts on a Pebble, with 30 Illustrations, eighth edition, 1850. Lyell, Sir Charles, Travels in. America, 1845, and 1849. DESCRIPTION OF THE FRONTISPIECE. THE MOA OF NEW ZEALAND. The Frontispiece represents the entire series of bones composing the right foot of the Moa (_Dinornis robustus_), found imbedded in an erect position, with the corresponding foot a yard in advance, in a turbary deposit, at Waikouaiti, in the Middle Island of New Zealand, in 1849. The figures are one-third less in linear dimensions than the originals. Figures 1^_a_, 2^_a_, 3^_a_, show the palmar, or under surface of the respective toes, and exhibit the trochlear or articulating extremities of the phalangeal bones. * * * * * The ancient swamp or morass in which these matchless specimens were imbedded, is situated on the shore, in a little creek or bay near Island Point, at the mouth of the river Waikouaiti, and is covered by the sea except at the lowest tides. Many remains of the largest species of Moa have from time to time been obtained from this deposit; the bones sent to England by Dr. Mackellar, Mr. Percy Earle, and others, figured and described in the Zoological Transactions by Professor Owen, were from this locality. The specimens figured were obtained by Mr. Walter Mantell, in 1849, when visiting Waikouaiti, as Government Commissioner for the settlement of Native claims. On the recession of the tide, the upper (or proximal) ends of the metatarsals were just visible above the surface: these were carefully dug up, and all the bones of the respective toes numbered, one by one, as they were extracted from the soil. In this state they were sent to me, and have subsequently been articulated under my direction, in their natural order of arrangement.[1]