Plate XXXIX. FILICALES: ALETHOPTERIDAE 



1. Alethopteris davreuxi (Brongniart) Goeppert, from Mazon 



Creek, U I Coll. No. P 1308. 



2. Alethopteris serlii (Brongniart) Goeppert, from Mazon Creek, 



U C Coll. No. 32060. 



3--J. Alethopteris serlii (Brongniart) Goeppert, from Mazon Creek, 

 K Coll. 



96 



