EXPLANATION OF PLATE LXI1. 
Fic. 1.—Polypodium aequale.—la, Fourth pair of pinnae; 1b, First pair of pinne, 
FG, 2.—Polypodium teresae,—2a, Fifth pair of pinnee; 2b, First pair of pinnee, 
Fic. 3.—Polypodium firmulum,—8a, Fifth pinna; 3b, Lowermost pinna, the origin of the subopposite 
one indicated. ; 
Fic. 4.—Polypodium fissidens.—4a, Fifth pair of pinne of type frond; 4b, First pair of pinne of a 
small frond; de Sixth pinna of a third frond, very fertile. 
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