846 The American Naturalist. [September, 
The Lake Ridges of Ohio and their Probable Relations to the Lines 
of Glacial Drainage into the Valley of the Susquehanna. — 30 min. — 
By G. F. Wright. 
The Moraines of the Wabash-Erie region. The Irondequoit Glacier. 
~\^ min.— By C. R. Dryer. 
Glacial Phenomena of Northern Indiana and Northeastern Illinois. 
— 20 rain. — By Frank Leverett. 
The Attractive Scenery of our own Land.— 20 min.— By A. S. Bick- 
The Mastodon of Kent and What We Know About It.— 20 min.— 
By Ed. Jones, Esq. 
On Certain Remarkable New Fossil Plants from the Erian and Car- 
boniferous, and on the Characters and Affinities of the Paleozoic 
Gymnosperms.— 20 min.— By Sir Wm. Dawson. 
Mammoth Cave. — 20 min. — By H. C. Hovey. 
The Devonian System of North and South Devonshire.— 25 min.— 
By H. S. Williams. 
A Classification of the Topographic and Geologic Features of Texas, 
with remarks upon the Areal Distribution of the Geologic Formations. 
—20 min.— By R. T. Hill. 
The Eagle Flats— Formation and the Basins of the Trans-Pecos or 
Mountain ;us Region of Texas.— 5 min.— By R. T. Hill. 
The Ancient Volcanoes of Central Texas.— 5 min.— R. T. Hill and 
E. T. Durable. 
The Geology of the Staked Plains of Texas, with a Description of 
the Staked Plains Formation. — 5 min.— By R. T. Hill. 
The Geology of the Valley of the Upper Canadian from Tascosa, 
Texas, to the Tucumcari Mountains, New Mexico, with notes on the 
age of the same.— 10 min.— By R. T. Hill. 
The Reality of a Level of no Strain in the Crust of the Earth.— 30 
min.— By E. W. Claypole. 
The Geological Position of the Ogishke Conglomerate.- 30 min.— 
By Alexander Winchell. 
The Origin of Gneiss and other Primitive Rocks.— 15 min.— By 
Robert Bell. 
Observations on the Trap Ridges of the East Haven (Conn.) Reg- 
ion.— 30 min.— By E. O. Hovey. 
On a Possible Chemical Origin of the Iron Ores of the Kewatin in 
Minnesota.— 20 min.— By N. H. Winchell and H. V. Winchell. 
Notice of some Zircon Rocks in the Archsean Highlands of New 
Jersey.— 8 min.— By F. L. Nason and W. F. Ferrier. 
