Pecopteris cistii Odontopteris genuina 
Pecopteris daubreei Odontopteris sp. nov. 
Pecopteris lamurensis Calamites suckowi 
Sphenopteris minutisecta Annularia sphenophylloides 
Dicksonites pluckeneti = Annularia stellata 
Alethopteris magna Sphenophyllum oblongifo- 
Alethopteris grandini lium 
Lescuropteris moori Cordaianthus sp. 
Zygopteris erosa Walchia aff. piniformis 
Although this same general Upper Carboniferous 
flora continues to populate western Pennsylvania during 
Monongahela and Washington time, Walchia has not 
been found in either series of rocks. It has been found 
in the Greene series, at Mount Morris, in the following 
association : 
Callipteris conferta Odontopteris pachyderma 
Sphenopteris sp. Pecopteris arborescens 
Neuropteris odontopteroides Walchia aff. piniformis 
Two additional forms oceur in olive shales twelve 
feet above: 
Pecopteris polymorpha Odontopteris cf. reichi 
The Greene rocks are of lower Permian age. Cal- 
lipteris conferta, in a small variety, is very common. 
It is evident that in western Pennsylvania, Walchia 
occurs in the Upper Carboniferous as well as in the Per- 
mian. The same range has been cited for Wadlchia in 
Kansas,” and for the Cisco (= Monongahela) of Texas. 
The occurrence of conifers in Prince Edward Island 
and Nova Scotia involves again, the relative geological 
age of the strata in which Walchia has been found. Daw- 
son considered them to be of Permian age, and most in- 
“Elias, XI Int. Geol. Congr. Abstracts. pp. 69, 70. 1933 
[15] 
