1873.] | 309 ‘Hunt. 
succession of eozoic rocks will soon become as familiar as the 
names of the New York system of paleozoic formations. 
Dr. C. T. Jackson said that he was commissioned to. make 
the geological survey of N. H. in 1840, and that the work 
was finished in 1844, the results being embodied in a quarto 
report with maps and sections. 
The geological map was to have been colored, but want of 
time prevented ; however, the limits of the different rocks are 
clearly shown by lines. He was pleased that Prof. Hitchcock 
had found so few additions or corrections necessary in the map. 
He had not found in place the gneisses or granite containing labra- 
dorite, which Prof. Hitchcock had succeeded in doing, nor had he 
noticed the fossil corallines discovered by Prof. Hitchcock in the 
impure limestones of Lancaster, N. H.; these he believed to belong to 
the Vermont system properly, and thought no inference concerning 
the age of the White Mountains could be drawn therefrom. 
The supposed fossils of Prof. Rogers in the metamorphic slates of 
the White Mountains, had been shown to be andalusite macles, and 
he had inferred the old Silurian age of this formation from similar 
rocks in Maine, where characteristic fossils had been found. , 
Dr. Jackson believed the classification proposed was hypothetical 
to a great extent, and that sufficient reason for the adoption of the 
New York nomenclature was not shown; nevertheless he was gratified 
with Prof. Hitchcock’s attempt at a new classification of the rocks of 
New Hampshire. 
Dr. Sterry Hunt alluded to the notion for a long time 
held by American geologists that the crystalline schists, both 
of the Green Mountain and White Mountain series, were 
strata of Paleozoic age, altered in some unexplained manner. 
Dr. Hunt had, since 1870, controverted this view, and had shown 
that in eastern North America, in various localities, uncrystalline 
strata containing the remains of the first or so-called primordial pale- 
ozoic fauna include fragments of these more ancient crystalline 
schists, which are really pre-paleozoic or eozoic. In this class he 
includes the Laurentian, the Huronian or Green Mt. series, the White 
Mt. series (once called by him Terranovan, for which he has since 
