REPORT OF THE DIRECTOR, 1922 57 
petioles of the frond; but about 1870 or 1871 a Mr Lockwood of 
Gilboa found the upper part of one of these trunks, with its leaf- 
scars preserved and petioles attached. This specimen, figure 1, in the 
collection of Professor J. S. Newberry, was described by Dawson,'* 
under the name Caulopteris lockwoodi, as probably the 
a 
Spee 
— ‘y S 
Fig. 1 Portion of trunk of Eospermatopteris (Caulopteris lockwoodi Daw- 
son) showing attachment of the petioles and the leaf-scars. (Reduced; after 
Dawson, 1871.) 
upper part of one or the other of his species of Psaronius found 
in the same bed. Dawson’s description is as follows: 
Trunk from 2 to 3 inches in diameter, rugose longitudinally. 
Leaf-scars broad, rounded above, and radiatingly rugose, with 
an irregular scar below, arranged spirally in about five ranks; 
vascular bundles not distinctly preserved. Petioles slender, much 
expanded at the base, dividing at first in a pinnate manner, and 
afterwards dichotomously. Ultimate pinnae with remains of 
numerous, apparently narrow pinnules: 
The character of the fronds led Dawson to believe that the plant 
approached in that respect to the cyclopterids of the subgenus 
Aneimites. Today we know that both Eospermatopteris 
(Dawson’s Psaronius) and Aneimites are both seed ferns 
belonging to the important phylum Pteridospermophyta. 
The outer cortex is the only structure of the stumps and trunks of 
these trees that is to any extent preserved. The interior structures 
“ Davveom, Sie. Wi Jour, Geol Socy wey.) eyo 7p KGa sien: 
Canada, 1871, Fossil Flants, p. 59 (figured only). 
