XXV.—Geological Account of a Series of Animal and Vegetable Remains and of Rocks, collected by J. Crawfurd, Esq. on a Voyage up the Irawadi to Ava, in 1826 and 1827.

For the specimens and notes which form the subject of the present communication, the Society is indebted to the zeal and activity of J. Crawfurd, Esq., one of its Fellows, who having occasion to traverse the Burmese Country, on an embassy to Ava in the years 1826 and 1827, discovered an extensive deposit of organic remains in that unknown and distant region. He has brought home specimens of these remains, both animal and vegetable, as well as of the strata in which they were found, and has with much judgement and liberality presented them to the Geological Society of London, and to several other scientific Societies. It is on an examination of these specimens, and of the notes contained in Mr. Crawfurd’s daily journal, that the observations and descriptions that make up the present memoir are founded. Before I proceed to the details of this interesting subject, it may not be amiss to refer to the state of our knowledge, or rather ignorance, of the geology of these regions, antecedently to the discoveries of Mr. Crawfurd; an ignorance which our frequent and extensive intercourse with India has but recently and in a very slight degree tended to dispel; since with the exception of two Memoirs in the Geological Transactions * ,—the one a paper by Mr. Colebrooke on the N.E. border of Bengal, the other a description of a collection of specimens made by Mr. Fraser, on a journey from Delhi to Bombay; and of two brief notices in the same