Geological Communications. 123 
properly,) but we were not able to decide whether it embraced, over- 
lay, or lay under, the bituminous coal of Tioga. The rock strata, 
embracing the Tioga coal and Carbondale coal, when traced into the 
state of New York, to the distance of thirty miles, are certainly sepa- 
rated by an extensive stratum of limestone. But the limestone may 
disappear, in a kind of cuneiform termination, a little north of the 
Pennsylvania line; leaving, what I have called, the second and third 
graywacke rocks to unite in one—the lower part embracing the an- 
asphaltic, and the upper part the bituminous beds of coal. This 
specimen was taken from the rock in which reeds, ferns and palms 
are found in abundance. But if it is the remains of a vertebrated 
animal, all doubt ceases respecting the stratum, embracing the bitu- 
minous coal of Tioga, being upper secondary. If it is a culmiferous 
plant, the question is still open for discussion. 
The graywacke rock, embracing the specimen, does not contain 
the glimmering scales, always found in first graywacke, and generally 
in small quantities in second graywacke. It is a dirty yellowish grey, 
in the cleavage where the impression is made ; but of the usual color 
graywacke, in a fresh fracture. Amos Eaton. 
Rensselaer School, Troy, Jan. 22, 1831. 
Since the above was in type, a note has been received from its 
author, saying that he had taken much pains to ascertain whether 
this species of petrifaction had been hitherto published or observed. 
Foreign journals were carefully examined, and enquiry was exten- 
Swely made by a traveller in Europe. It appearing to be original 
and very interesting, was communicated for publication. A friendly 
tall from J. H. Fielding, President of Madison College, Penn. has 
*aused some doubt. He has an indistinct recollection of something 
of the kind, as he believes. ‘The author therefore requests, that 
Wherever this Journal is read, enquiry for a similar specimen, or a 
Publication of it, may be sought and information communicated to 
editor ; as other parts of this organic relic may have been found, 
Which will settle the question, whether it was an animal, or a vegeta- 
ble of the reed family. One of our most accurate devotees to the 
_ Study of recent organic relics, William Cooper, Esq. of the New 
‘ork Lyceum, has examined it. He is in doubt, but is inclined to 
éve it an Arundo, or some plant of that family. Surely, says the 
thor, it resembles the Phytilus Martini, when magnified with a 
* Power of 100.—Eprror. 
