20 TRANSACTIONS OF THE |ocr. 28, 
The collections sent in amount to 4500 pounds, which amount is 
about equally divided between the Upper and Lower Ordovi- 
cian. 
The first stop was made at Larrabee Point, Vt., at the south- 
ern end of the lake proper, at which point was found the best 
Trenton section seen along the lake. The rocks are exposed in 
a quarry and along the shore, dipping slightly to the north and 
northwest. The Black River limestone is well seen in the 
quarry near the sawmill south of the Lake House. At the top 
of the quarry are beds of impure shaly limestone containing a 
great abundance of Parastrophia hemiplicata, Hall. This 
brachiopod ranges through about six feet of strata and serves 
to mark this particular horizon all along the lake. It also 
serves as a means of recognizing the transition from the Black 
River limestone to the overlying Trenton limestone. These 
Parastrophia shales are exposed also on the shore, where they 
are overlaid by thin layers of the Trenton limestone. This 
limestone then extends along the shore in a northerly direction 
past the Lake House until it finally runs under the water, and 
is followed further north by the Utica shale; the transition be- 
tween the two not being visible. 
Shoreham, six miles east of Larrabee Point, was visited in 
hopes of finding deeper water sediments and consequent changes 
in the faunz. Fine black shales seemed to be more abundant, 
but the rocks have undergone a considerable amount of meta- 
morphism,and slaty cleavage has destroyed all but mere traces 
of fossils. 
Ticonderoga, on the western shore of the lake, is surrounded 
by Calciferous rocks containing few fossils. Toward Crown 
Point, however, the Lower and Middle Chazy begin to come in, 
and some fossils may be obtained. On Crown Point, in the 
vicinity of Wilkerson’s Ferry, were obtained fine specimens of 
Maclurea magna, in many of which the test remains intact, 
having separated freely from the matrix. 
Fort Cassin was reached from Vergennes, Vt. At the former 
place a good collection of trilobites was obtained from siliceous 
limestone beds (ying between the famous Fort Cassin and the 
Calaurops beds of Whitfield. 
At Burlington a day was spent in examining the collections 
at the University of Vermont, through the courtesy of Prof. G. 
H. Perkins, and in visiting the red sandrock quarries south of 
the city. In these quarries there is an interesting trap dike de- 
scribed by J. F. Kemp in the paper on “ The Trap Dikes of the 
Lake Champlain Region.” Since Prof. Kemp’s visit a consider- 
able amount of rock has been removed from the quarry face, 
