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 Williamson, W. G. On the Structure of the Woody Zone of an undescribed form of Calamite. 8vo. London, 1869.

Wilson, A., T. Login, and G. Higgin. Irrigation in India and in Spain. Edited by James Forrest. 8vo. London, 1869. Pre- sented by T. Login, Esq.

Winchell, A. Appendix to a Beport on the Grand Traverse Region. 8vo. 1866.

— . A Eeport on the Geological and Industrial Resources of the Counties of Antrim, Grand Traverse, Benzie, and Leelanaw in the Lower Peninsula of Michigan. 8vo. Ann Arbor, 1866.

— . Man the last term of the Organic Series. 8vo. Ann Arbor, 1867.

Statement of operations in the Museum of the "University of Michigan, in the Department of " Geology, Zoology, and Botany' and the Department of " Archaeology and Belies " for the year ending September 24th, 1868.

. The Onward March of the Bace.

— . The Fruit-bearing Belt of Michigan. 8vo.

Stromatoporidse : their Structure and Zoological Affinities. 8vo.

ZirJcel, Ferdinand. Leucitgesteine im Erzgebirge. 8vo.

IV. BOOKS PUBCHASED FOB THE LIBBABY.

Canterbury Gas and Water. New Water Supply. Beport from the Engineer (S. C. Homer sham). 8vo. 1869.

Lyell, Sir Charles. Principles of Geology. 10th edition. 2 vols. London, 1868. (Second Copy.)

Milne-Edwards, A. Becherches Anatomiques et Paleontologiques pour servir a l'Histoire des Oiseaux Fossiles. Livraisons 26-30.

Ooster, W. A., und C. von Fischer. Protozoe Helvetica. Band I. 4to. 1869.

Paleontologie Frangaise. Terrain Jurassique. Livraisons 16-18. 1869.

Quenstedt, F. A. Petrefactenkunde Deutschlands. I. Abth. Band IT. Heft 3, with Atlas. 1869.