422 NEW YORK STATE MUSEUM 
the canal. Amsterdam is among the localities at which the rock 
was noticed.} , 
In the second report Mr Vanuxem mentions the fossil F uc oid- 
es demissa (Stylastrites of Eaton) as characterizing the 
Birdseye and names among the localities of the rock “Amsterdam 
on both sides of the river near Evakill, Marcellus quarry [Rock- 
ton] between the kill and Chucteronde creek [Chuctanunda of the 
present report];’” and again, “this rock contains fragments of the 
Calciferous at Marcellus quarry near Amsterdam” (p. 283). 
In Vanuxem’s final report a full account of this rock is given 
with a woodcut exhibiting the fossil Fucoides demissa 
(=P hy top sis/tu bullos.a, *Hall) He! says |. thes eindcere 
limestone of the Mohawk is readily distinguished from the other 
rocks by its light dove-color, which by long exposure to the weather 
becomes of a light ash gray or white. It is usually in thick layers 
which are straight, having very little interposed matter between 
them, with vertical joints which are so straight and even as to 
give to the rock where quarried the appearance of a wall. In its 
grain it is very compact, fracture smooth, and from being brit- 
tle, is an easy rock to work.”* Among the localities mentioned for 
the Birdseye are a “ small quarry back of Amsterdam ” where “ the 
and “in two 
insulated hills between the [Marcellus] quarry and Chucteronde 
ener] Gp. Ain, 
Emmons in his final report of 1842 figured the fossil Fucoides 
demissa considering it as an animal of the class of Polypes, 
and also figured and described a peculiar anastomosis sometimes 
seen on the surfaces of layers of Birdseye.4 In his volume on agri- 
culture he states that the Orthoceras multicameratum 
is equally characteristic with Fucoides demissa. 
In Darton’s paper on the Geology of the Mohawk valley (1893) 
the Birdseye is described as a white-weathering rock contain- 
ing fucoid stems and represented about Amsterdam by “from 3 
to 5 feet of very compact, gray to black, thin bedded limestone 
’ 
layers are few in number and of no great thickness ’ 
1Loc, cit. Assembly doc. no. i61, p. 162, 163. 
Loc. cit. Assembly doc. no. 200, p. 259. 
®Geology of New York, pt 8, p. 38. 
*Geology of New York, pt 2, p. 109, 110. 
‘Agriculture of New York, 1:122 
