PLATE XXIV. 



Figs. 1,2a. Asterocarpua Firginiensis 1 spec. nov. Page 42. 



Fig. 1. Portion of a compound fertile pinna of perhaps a variety of A. Virqinietmt. 



Fig. 2. Fragment of a larger form of the same plant. 



Fig. 2a. Pinnules of Fig. 2, magnified to show the sori. 

 Figs. 3-5 a. Asterocarpua Virginiensia, var. obtusilobus. Pages 45 to 46. 



Fig. 3. Portion of a sterile compound pinna of the normal form. 



Fig. 3 a. Pinnules of Fig. 3, magnified to show the nervation. 



Fig. 4. Portion of a long sterile ultimate pinna. 



Fig. 4a. Pinnule of Fig. 4 magnified. 



Fig. 5. Ultimate sterile pinna with broad deep lobes. 



Fig. ha. Pinnule of Fig. 5 maguified. 



