68 NEW YORK STATE MUSEUM 
radiating irregularly from the place of attachment of the pedicel. 
Very fine, closely-placed radiating lines are visible along the margin 
itself in some of the specimens, and these do not appear to be due to 
shrinkage in preservation. 
The specimens vary in size and, as preserved, are rounded-oval 
to round in form. The round forms show the following diameters: 
8.7mm, 9mm, 9.7mm, 17.4mm, 19mm, 19.5mm; the rounded-oval 
specimens have the following measurements: IImm x 9.7mm; 
I1.3mm x 9mm; 11.8mm x 9.7mm. The oval specimens owe their 
shape to the fact that in preservation they have been squeezed out 
along one diameter ; but taking this into consideration, they run about 
the same size as the smaller round forms which represent the average 
and most frequently represented sizes. As noted in the measure- 
ments above, three specimens show measurements about twice the 
average size, only two of which are completely preserved (plate 11, 
figures 9, 10). One of them shows a wavy margin and the other an 
almost fluted margin. Whether these three forms represent simply 
Jarger specimens or more maturely developed forms can not be 
decided, though the latter seems more probable. 
Eospermatopteris erianus (Dawson) 
EKospermatopteris textilis (Dawson) 
Dawson*® distinguished two species of trees in the Gilboa collec- 
tions submitted to him. FE. erianus was also noted as coming 
from Madison county, though there is now in the State Museum no 
specimen of this species from that section. Dawson’s descriptions 
are as follows: 
IP, CwriamuUs.  IWirwak compllerehy stmyested writin corralllike 
aerial roots parallel to each other, and either closely appressed 
or arranged at regular intervals. Each root consisting of an 
outer, probably cellular, coat, with an axis of fibers and scalari- 
form or reticulated vessels. (See plate 7). 
IP, Wesevilig. ‘Wirwialk wriln wne Oulwer Simm@ce manked write 
irregular ridges and furrows, produced by tortuous aerial roots, 
which in the center of the stem are seen to be interlaced with each 
other. They are less tortuous in what seems to be the upper 
part of the fragment. (See plates 2-6). 
Dawson’s species, then, were based upon the arrangement of the 
sclerenchyma strands of the outer cortex, which he interpreted as 
aerial roots; and today the species can stand only on those char- 
® Dawson, J. W., Canadian Fossil Plants, Canadian Geol. Surv., 1871, 
p. 58, 505 Elall})J., zath Rept N. Yo State Gaby Nat. Hust) 1877) pias: 
