1112 The American Naturalist. [December, 
One feature that will doubtless be noticed at once by everyone who 
examines the material in the moraine at Arrochar, is the quantity of 
soapstone and limonite ore contained in it, evidently due to the erosion 
of the serpentine ridge which near this point was crossed by the gla- 
cier. 
Summarizing the results of our facts and observations we may pic- 
ture to ourselves the former coastal plain, consisting of Cretaceous and 
later deposits, extending to the base of the serpentine ridge, with a belt 
of schistose or gneissic rocks around its base. On the advent of the 
glacier, advancing from the northwest these deposits were eroded and 
pushed ahead by the ice mass and assorted by the torrents which flowed 
from it, and which, on its retreat, left the deposits of the till, forming a 
superficial unassorted cap, composed of fragments of rocks from the 
north, in which the “Triassic sandstones, shales and traps of New Jer- 
sey are the most abundant constituents. In the depressions of the till, 
local deposits of gravel, sand and clay would accumulate, colored with 
the prevailing red from the eroded Triassic rocks. 
ptember, 9.—Dr. N. L. Britton showed a specimen of Agrimonia 
mollis as an addition to the flora of the Island. This and the com- 
moner A. striata, have been included in manuals under A. eupatoria 
which is, however, a European species. 
Mr. Arthur Hollick presented a piece of Triassic sandstone, found 
in the Drift at Arrochar, by Miss Grace Hollick, on which were casts 
of a plant stem. 
Although Triassic shale and sandstone were among the most 
abundant of our Drift material this is the first specimen in 
which we have been able to identify any indication of a fossil. A 
carefully prepared drawing was submitted to Professor Lester F. 
Ward, paleobotanist of the U. S. Geological Survey, and was by him 
submitted to Professor Wm. M. Fontaine, who concluded that it was 
probably Equisetum rogersi Schimp. If so this is not only an interest- 
ing addition to our list of Drift fossils but is of interest also on account 
of its rarity in the Triassic of New Jersey, from whence it must have 
been derived. So far as I know New Milford is the only locality in 
New Jersey from which it has been reported. 
Mr. Wm. T. Davis read the following miscellaneous memoranda 
and exhibited the specimens mentioned. 
During the past summer the Periwinkle ( Littorina litorea) has been 
found in some numbers alive on the shore at the Narrows, and also on 
the rocks at Princes Bay. In these Proceedingsfor January 14, 1888, 
Mr. Sanderson Smith, upon the finding of an empty shell at the Nar- 
