337 
RECENT PUBLICATIONS. 
1. State and Government Reports. 
Seventh Annual Report of the U. S. Geol. Surv. for 1885-6. By J, W. 
Powell, Director, Washington, 1888, 4to, 656 pp. numerous illustra- 
tions. Besides the oflBcial and administrative reports this contains the 
following papers : The Rock Scorings of the great ice invasions. T. 
C. Chamberlin. Obsidian Cliff, Yellowstone National Park. Joseph 
P. Iddings. Report on the Geology of Martha's A^ineyard. Nathan- 
iel S. Shaler. On the classification of the early Cambrian and pre- 
Cambrian formations. R. D. Irving. The structure of the Triassic 
formation of the Connecticut valley. William Morris Davis. Salt- 
making processes in the United States. Thomas M. Chatard. The 
Geology of the Head of Chesapeake Bay. W. J. McGee. 
The Geological and Natural History Survey of Minnesota. Vol. ii. of 
the final report. 4to, 695pp, 42 plates and 32 figures. By N. H. Win- 
CHELL, assisted by Warren Upham. 
2. Proceedings of scientilic societies. 
Transactions of the Wisconsin Academy of Sciences; Arts and Letters. 
VOL. VII, 1883-87, Madison, 1889. Contains articles on the Raised beaches 
of ZaX-e J/?c/izfifa?i, by Frank Leverett, and a report by S. D. Peet on 
The so-called Elephant mound in Grant County, and effigies in the region 
surrounding it." Mr. Peet concludes "that there are no elephant 
efl&gies in the state, and that the so-called elephant mound was design- 
ed to represent either the bear, the wild-cat the buffalo, or the moose, 
every one of which contains the same elements of a heavy body, a 
large head, and a protruding snout." 
Proceedings of the Davenport Academy of Natural Sciences, vol. v, 
part 1, 1884-1889. Davenport. Contains, Defense of our local Geology, by 
W. H. Barris ; Volcanoes of the Sandivich Islands, by C. S. Watkins ; 
An Ancient mine in Arkansas, by ^Vva. A. Chapman; A description of 
the Rockford shales of Iowa, by Clement L. Webster ; and Mound explor- 
ation in northwestern Iowa, by Frederick Starr, with a variety of zoolog- 
ical papers. 
3. Papers in scientific journals. 
Am. Journ. Sci. April No. The Denver Tertiary formation. W. 
Cross. Events in North American Cretaceous history, illustrated in 
the Arkansas-Texas division of the southwest region of the United 
States. RoBT. T. Hill. The distribution of Phosphorus in the Lud- 
ington Mine, Iron Mountain, Michigan. D. H. Browne, with two plates. 
Palc'eohatteria Credner, and Proganosauria. G. Baur. New American 
Dinosauria. O. C. Marsh. 
American Antiquarian. May No. The animals known to the effigy- 
builders. Stephen D. Peet. Ancient mining in North America. J. 
S. Newberry. 
4. Excerpts and individual publications. 
Events in North American Cretaceous history, illustrated in the Ar- 
