ADDITIONS TO THE LIBEAEY. 2 1 3 



Spencer^ J. W. The Iroquois Beach : a Chapter in the Geological 

 History of Lake Ontario. 4to. Montreal, 1889. 



Stefani, C. de. Le pieghe delle Alpi Apuane. 8vo. Florence, 

 1889. Presented hy the R. Istittito di Stadj Su^eriori Pratichi e 

 di Perfez'tonamento, Florence. 



Steinmann, G., und L. Doderlein. Elemente der Palaontologie. 

 2^ Halfte. 8vo. Leipzig, 1890. Presented hy Herr W. Engel- 

 mann. 



StrucJcmann^C. Die Grenzvschichten zwischen Hilsthon nnd "Weald en 

 bei Barsinghausen am Deister. 8vo. Berlin, 1890. 



Thomas, C. See Peeiodicals, Washington. 



True, P. W. fe Peeiodicals, Washington. ^Smithsonian Institution. 



Ulrich, E. 0. See Canada. 



United States. Oeolocjical Survey. Seventh Annual Eeport, 1885- 

 86. 8vo. Washington, 1888. 



. . Monographs. Yol. xiii. Geology of the Quicksilver 



Deposits of the Pacific Slope, by G. P. Becker. 4to. Washing- 

 ton, 1888. 



. . . Atlas. Pol. Washino-ton, 1887. 



. . Monographs. Yol. xiv. Possil Pishes and Possil 



Plants of the Triassic Pocks of New Jersey and the Connecticut 

 Yalley, by J. S. Newberry. 4to. Washington, 1888. 



. . Bulletin. Nos. 48-53. 8vo. Washington, 1888 



and 1889. 



Upham, Warren. Glaciation of Mountains in New England and 

 New York. 8vo. Boston, 1889. 



. Marine Shells and Pragments of Shells in the Till near 



Boston. 8vo. Boston, 1889. 



. Prof. Henry Carvill Lewis and his work in Glacial Geology. 



8vo. Minneapolis, 1888. 



. The Structure of Drumlins. 8vo. Boston, 1889. 



VssTicr, W. A. E. The Devonian of the Western Eegion, and 

 Geology of Tavistock. 8vo. Plymouth, 1889. 



Yon Cappelle, J. H. Les Escarpements du "Gaasterland" sur la 

 cote meridionale de la Prise ; suivie d'une etude sur les roches 

 siliceuses a spicules de spongiaires du Boulder-clay du Eoode- 

 Klif, par G. J. Hinde. 8vo. Brussels, 1889. 



Vasseur, G., et L. Carez. Sur une nouvelle Carte geologique de 

 Prance au 5-ooVD""cr- '^^^' Paris, 1889. 



. See Bollfuss, G. 



