286 The American Geologist. May, isds 
which is indeed of coarsest texture. One-thiid of the stump had 
been rotted out with its pithy center before petrification took 
place. The same must have been the case with some fascicles of 
cells leaving tubular holes through the length of its growth, some 
being |- inch in diameter. A still better find was a section of a 
trunk eight inches long and ten inches thick, from which the 
perfect characteristics of the tree can be ascertained. From the 
latter the description and illustration are taken. 
ENDOGEN. 
Genus: Winchdlin<i.. (n. gen.). 
"Winchellina fascina. (n. sp. ) 
Among the flora of endogens oar new genus stands isolated. If 
no interior arrangement could be ascertained, the exterior only 
would let us surmise a palm or fern in this form. But the ex- 
cellent preservation of this plant showing so minutely its inner 
organization makes it anobjectof high interest in our fossil flora, 
as well as in the botanical world. I have named it Winchellina 
as a token of kind remembrance of the late Dr. Alex. Winchell 
of Ann Arbor. While we have in numerous plants well de- 
veloped cell- bundles so arranged as to cause a harmonious 
cellular promotion and necessarily interwoven with the whole 
organism, we observe in our plant an arrangement, as it were, of 
independent growth of fascicles. Each of them being encased 
by a very thick periderm, exhibits a peculiar inner tissue of ob- 
long sub-quadrate cells with thick walls, simulating a trans- 
verse section of Carboniferous fossil pine. The whole tree is 
composed of such fascicles which are f inch mean diameter, the 
outer ones crowding each other in contorted and polygonal forms 
and causing the longitudinally ribbed exterior. Toward the more 
inner portion the fascicles become more circular, parenchymous 
tissue filling the space. The third zone is crowded again with 
small oval fascicles enclosing tightly the parenchymous center 2^ 
inches in diameter, the structure of which can be seen in small 
perfectly circular cells. 
It is likely that thiswas a most stately tree and that each fasci- 
cle shot out an independent branch crowning the tree with a bun- 
dle of diverging long, linear, reed-like branches. 
