Plate XXIII. FILICALES: NEUROPTERIDAE 

 and LINOPTERIDAE 



1. Linopteris neuropteroides (Gutbier) Potonie, from Mazon Creek, 



U I Coll. No. P 1293. 



2. Neuropteris oblongifolia Gutbier, from Mazon Creek, U I 



Coll. No. P 1294. 



3. Neuropteris flexuosa Sternberg, from Mazon Creek, K Coll. 



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