have not received specific designation. All of these in- 
determinate fragments are from [Kansas and ‘Texas and 
probably belong to well-known species. 
This genus obviously possessed an extensive geo- 
graphic distribution during Stephanian and Permian 
times. Its value as an “‘index’’ genus has been recognized 
in Kurope. Halle considered it to be significant in China, 
and Elias (1. ¢.) called attention to its position in the 
Kansas succession. 
The plants associated with T'aeniopteris jeyunata in 
the Monongahela series of western Pennsylvania are: 
Pecopteris arborescens Neuropteris cordata 
Pecopteris feminaeformis Neuropteris rogersi 
Pecopteris unita 
Pecopteris polymorpha 
Pecopteris bredovi 
Pecopteris daubreei 
Callipteridium gigas 
Diplotmema ribeyroni 
I i 
(Mariopteris cordato-ovata 
Neuropteris grangeri 
Neuropteris sp. 
(aff. N. neuropteroides) 
Odontopteris reichi 
Odontopteris genuina 
Odontopteris sp. nov. 
Sigillaria brardi 
Lesqx., non Weiss) Asterophyllites equisetiformis 
Zeilleria sp. nov. Sphenophyllum oblongifolium 
Sphenopteris minutisecta Sphenophyllum tenuifolium 
Alethopteris grandini Poacordaites sp. 
Walchia sp (aff. W. piniformis) 
Lescuropteris moorii 
Taeniopteris jejunata 
This association appears in the Upper Conemaugh 
Series (Clarksburg member) and continues with slight 
modification to the top of the Washington Series. Les- 
curopteris is abundant in the lower portion of the se- 
quence and Odontopteris is most abundant in the middle. 
The affinities of this flora are with those of St. 
Etienne, Commentry, Gard, Blanzy and Creusot. These 
localities are ‘type’? Stephanian, and the species cited 
belong to the middle and upper Stephanian. 
[ 146 | 
