Plate XXX. FILICALES: PECOPTERIDAE 



1. Pecopteris MILTONI Artis, from Mazon Creek, U C Coll. No. 32047. 



2. Pecopteris vestita Lesquereux, from Mazon Creek, U I Coll. 



No. P 1301. 



3. Pecopteris squamosa Lesquereux, from Mazon Creek, U I Col!. 



No. P 1302. 



78 



