82 . TRANSACTIONS OF THE [DEc. 16, 
Rafinesquina deltoidea. Orthodesma contracta.* 
Strophomena planumbona. Beyrichia. 
Lingula riciniformis. Conularia. 
Orthis xequivalvis. 
For the lowest beds the nearest continuous section. was found 
at 
II. Potanp LIMEKILN SEcTION—130 A. 
On the western bank of West Canada Creek, three miles 
south of Poland, thence passing upward along the cut of the 
Adirondack Railroad, which here closely follows the shore, 
thence across an open meadow, which covers strata estimated at 
fifteen feet in thickness, to the roadway, and thence through a 
small abandoned lime quarry and up the hill lying behind it. 
The latter portion corresponds to the lower portion of the 
Rathbone Brook Section (B), on page 84, which follows the 
south side of the same hill. 
A 1-2. CatcirErous.—light gray, compact, heavy bedded, 
massive quartzite, weathering yellow; with Seolithus-like tubes 
filled with white quartz. The latter are uniformly vertical in 
the lower four feet, but above this are not always vertical. In 
the upper portion the rock is filled with calcite seams and there 
are shaly portions apparently resulting from crushing. Dip 6° 
N., but changing further down stream to 6° 8. The lowest 
layers are exposed in the bed of the creek. The total thickness 
measured above Water WAS... 2.00% 6 cee wins on one one 
3-5. BrrDsEYE LimMEstone.—Ten feet above A?, on the west side 
of the railroad cut, the intervening layers being buried beneath 
debris, is exposed a dove colored limestone with scattered cal- 
cite nests, and a flinty conchoidal fracture. Dip 3° 8. 40° W. 
The lower layers have a distinct bite to the touch. The middle 
layers are the most homogeneous and weather lighter gray, in two 
to sixinch layers. At the top is a bed one foot thick, somewhat 
es on the surface, which weathers yellow....... . 54 feet. 
Brack River LIMEstone.—Two heavy barren beds of dark 
duitved compact: HimestOney sys wala See's eee ee 1. oes eee 
io. Capping the foregoing in the railroad cut, and also 
shown in slightly higher “lay ers in the adjacent field. Nearly 
black, compact limestone, having conchoidal fracture ; weather- 
ing gray or yellowish; impure. The rock is barren in some 
portions, crystalline and highly fossiliferous in others, especially 
toward the top; the fossils being brought into prominence only 
by weathering. Chert nodules occur through the rock. 
6 feet 9 inches. 
* We believe this is the first instance of this € ‘incinnati species being found in 
the eastern states. 
