THE 
AMERICAN GEOLOGIST 
Vol. XII. SEPTEMBER, 1893. No. 3. 
AN EXAMINATION OF GLYPTODENDRON, Claypole, 
AND OF OTHER SO-CALLED SILURIAN 
LAND PLANTS FROM OHIO. 
By Aug. F. Foerste, Dayton, Ohio. 
Did land plants of the class of LycopodiacecB live in the 
region of the Cincinnati anticlinal during the Clinton age? 
When in the December number, 1878, of the Geological Maga- 
zine, Prof. E. W. Claypole published his paper entitled. "On 
the occurrence of a fossil tree (Glyptodendron) in the Clinton 
limestone (base of Upper Silurian), of Eaton, Ohio, IT. S.," 
this question seemed answered affirmatively in the most direct 
manner. Again, in 1886, when Prof. Edward Orton found a 
peculiar fossil in the Clinton at Brown's quarry, two miles 
west of New Carlisle. Ohio, Leo Lesquereux wrote to him the 
following communication, which, although a private letter and 
not having the force of a published note, will be of interest 
in this connection : 
Columbus, Ohio, Oct. 27, 1886. 
Prof. Edward Orton, Columbus, O. 
Dear Sir: Evidently a Lepidodendron-knorria, that is Lepidoden- 
dron decorticated? passing to Knorria; but not the Glyptodendron of 
Claypole, which has the bolsters rounded at apex, not pointed like 
yours, which is of the type of L. veltheimianum, and perhaps the 
species. Specimen too obscure for specific determination, but valuable 
and interesting to a high degree. Glyptodendron is a Lepidodendron 
of the L. turbinatum type of the Chester group. I have in the past 
week received fine specimens of an Asterophyllites from the Trenton 
limestone, base of the formation at St. Paul, Minnesota. 
Leo Lesquereux. 
