Plate XXXVIII. FILICALES: ALETHOPTERIDAE 



1-2. Alethopteris serlii (Brongniart) Goeppert, from Mazon Creek, 

 U C Coll. No. 32056-7. 



3-4. Alethopteris serlii (Brongniart) Goeppert, from Braidwood, 

 U C Coll. No. 32058-9. 



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