80 
end was taken, is in the fine cabinet of Mr. William 
Hyde, who permitted me to use it with his wonted 
liberality and kindness. It is said to have been found 
in Northumberiand, Pennsylvania, and occurs in grey 
‘carbonate of lime. In the Philadelphia Museum, 
there is a fine fragment of this species, in which there 
is embedded some crystals of iron pyrites; it was ob- 
tained in Ulster County, New York. In the cabinet 
of the Academy of Natural Sciences, there is a longi- 
tudinal and hollow fragment, filled with ochre, and 
the oxide of iron; it is labelled from Lockport, New 
York. At Mount Hope Institution, near Baltimore, 
there is alsoa good specimen from the same locality. © 
In the Clinton collection, owned by the Albany Insti- 
tute, there is a large extended fragment, nearly five 
inches long. It is embedded in brown limestone, 
and was found in Madison County, N. Y. There are 
twelve articulations of the abdomen remaining, and 
the epidermal covering of the tail is distinctly marked 
with numerous dots. In the same collection there is. 
another large fragment of this species, consisting of 
the tail and fourteen articulations. It was found in 
Steuben County, New Yorks and occurs in grey 
limestone. It is slightly contracted and very much 
depressed laterally. There is also a head in the same 
kind of limestone, from Cazenovia, Madison County, ~ 
New York. In the cabinet of the Institute there is 
another specimen of this species, about six inches. 
in length, and nearly perfect; it isalsoembedded ina — 
similar rock, and was brought from Rochester, Mun- 
roe re New York. ule 
