vi Tnhle of Contents. 



XV. On a Proposed System of Lithologicai, Nomenclatuke — 

 by Prof. T. G. Chamberlain, Ph. D., Beloit College, Beloit; 

 also State Geologist 234 



XVI. Menobranchus Lateralis — by P. B. Hoy, M. D., Racine . . . 248 

 XVII. The Pipestone op Devil's Lake, by 'Hon. E. E. Woodman, 



Baraboo 251 



XVIII. The Larger Wild Animals that Have Become Extinct 



IN Wisconsin — by P. B. Hoy, M. D., Racine 255 



XIX. Observations on the Recent Glacial Drift op the Alps 



— by Prof. T. 0. Chamberlam, Beloit, State Geologist 258 



XX. Temperature of Pine, Beaver and Okanchee Lakes — by 



Elizabeth M. Gifford and Geo. W. Peokham, Milwaukee 273 



XXI. A Description of Some Fossil Tracks from the Potsdam 



Sandstone— by Pr(f. James E. Todd, Beloit College, Beloit. 276 



XXII. A Chaptek on Foundations — by Gapt. John Nader, Madison 283 

 XXIII. Primitive Architectdre in America — by Rev. 8. D. Pect, 



editor American Antiquarian, Clinton 290 



ADDENDA. 



Proceedings of the Academy from December 27, 1878, to July 5, 1881. . 321 



Librarian's Report, with catalogue. . 335 



List of Members 359 



